The next morning I got up feeling strangely free. I didn't have to worry or wonder about Teresa that day and it was surprisingly liberating. I did head out there eventually though but only Bonnie was at home.
"She's gone over to her friend Debbie's. I heard her say something about having her spend the night here."
I figured right away what she had in mind and my evil creative side came to the fore. I went back to my truck and got something out of the glovebox.
Bonnie was interested. "What is that thing?"
"It's an old micro recorder. I can hide it in Teresa's room and hear basically anything she talks about. It's voice activated too."
"You're bugging her room? I love it!*
That got Bonnie thinking though. "So with that recorder you can hear everything?"
"I should be able to. The microphone is really good on it. I'm not sure exactly how much it'll pick up, but voices should be easy for it."
She stood there thinking for a bit while I wondered where she was going with it. Finally she looked at me and asked, "Why don't you do video?"
I laughed at her question initially. Standing I looked down at her and told her, "Wait right there. I've got something for you."
I walked out and got the second toy from my vehicle. Walking back in I showed it to Bonnie.
"I'll show you this, but you can't tell anyone about it."
Bonnie smiled. "Deal."
I started the only video on it. It was taken out in the countryside and began with Teresa looking at me with a raised eyebrow. "What are you doing with that?"
She'd worn my favorite t-shirt that day. It was old and worn and clung to her tits perfectly. The fabric was so thin you could see the color of her already hard nipples right through it.
Then my voice came on. "I'm just getting some footage for those late nights when I get back to college and I'm all alone."
"In other words you're making a video to jerk off to."
"Pretty much. Does that bother you?"
"Not really. Although the fact that you might let someone else see it does."
"That's not gonna happen dear. This is for private use only. There's nothing on it yet though that would turn on anyone else though."
She smiled and looked around, obviously checking for other people. Then she looked at the camera and lowered her hands to the hem of her shirt. You could see the look of excitement in her face as she slowly pulled her shirt up revealing her braless DD tits to my camera. "Now there is."
"There certainly is. Go ahead, take that shirt off."
Teresa pulled it up and off, tossing it aside and shaking out her hair. Then she smiled back at me. "How's that?"
"Fucking fantastic. Play with them for me."
Bonnie and I watched intently as she did, caressing those huge mounds before she concentrated on her nipples. Her eyes closed as her fingers pinched and pulled her nipples harder than I thought would be comfortable. Finally she opened her eyes again and smiled my way.
"Now what Eric? As if I didn't know."
I laughed behind the camera. "You know me too well dear. Go ahead, you know what I want."
She did. She lifted one of those huge tits to her lips and my camera caught her tongue as it slid out to lick one of her own nipples. It made small circles around the hard bud, then she sucked it into her mouth for a moment. When she let it escape her lips, my camera caught it. Her hard nipple was shiny in the sunlight from her own saliva.
"I still don't understand why guys love seeing that."
"It's simple. Every time you do that all I can think of is you doing that to another woman. To begin with of course."
"Like that'll every happen." Bonnie laughed at that. "This is an old video isn't it?"
"Obviously." She looked back at the screen and watched her sister walk toward me on video. The camera followed her as she stopped in front of me and knelt. Her fingers hooked themselves in my shorts, pulling them down and revealing my cock. Teresa smiled up at the camera then. "Make sure you get this on video. I'm not going to do it again."
She opened her mouth and stuck out her tongue. As my camera caught it all she slid my cock over her tongue deep into her mouth. Then her lips wrapped around me and she went to work sucking my cock.
Bonnie watched in fascination as her sister gave me her very best that day. She even deep throated me a couple of times. The sight of her lips wrapped around the base of my shaft was incredible. Finally she picked up speed, going for a mouthful of my cum.
"Gonna cum dear." She nodded, sucking hard and fast. Finally I exploded in her mouth, giving her every drop I had that morning.
Teresa did something a bit different that day. Usually she'd just gulp it down swallowing it all. That day though she caught it in her mouth. She had a treat for me.
She opened her mouth and my cum ran down across her chin, slowly dripping down into her DD tits. There was very little left when she'd finished. She swallowed what was left, then rubbed my cum into the soft skin of her tits as my camera caught the entire scene.
Bonnie was amazed. "Damn that was hot!" She paused and then looked at me. "Make a video with me. Please?"
"I don't know Bonnie."
"I can promise you this. You'll get full nudity and lots more than she gave you on camera."
That was all I needed to hear. "Let's find you something to wear them that'll look good on camera."
She smiled and stood up. "I've got this. Wait right here."
She disappeared into her room and came back out a few minutes later. She was wearing an old football jersey from our local high school. You know the type, the ones with all the little holes in them? It had been cut off so she was showing major underboob along with her tits being plainly visible. The cut off shorts she was wearing with it would have started a riot if she wore them out. As she turned to show off for me I could see the cheeks of her ass hanging out.
"Ok. Let's go."
I headed to my truck and she got into her car to follow me. It didn't take us long to get to the spot where I'd shot the video of her sister. It was only a few miles away.
We climbed out and walked back a bit just in case anyone decided to come out that way. No one ever had when I was there, but you never know.
Bonnie finally turned to face me and I brought my camera up to catch everything. "So Bonnie, I've got a question for you. You're bi, right?"
"I'm very bi. You could call me an equal opportunity fuck I guess."
We both laughed and I asked her, "So how's that work? How do you decide on who you feel like doing that day?"
"Here's how it works. For me at least. I was at the beach the other day watching all the guys in their speedos. I was about to hit on one when this girl walked by and caught my attention. She was a black girl with the skimpiest suit I'd ever seen. So my attention went from cock to pussy you might say."
"So how'd that work out? How was she?"
"Delicious. Almost as good as my sister Teresa."
"That's another thing I wanted to ask about. How's the whole incest thing work for you?"
"To be perfectly honest I love it. Every time we have a threesome I get the best of both worlds. Her pussy and your cock."
"Speaking of my cock, your wearing too many clothes right now."
The shirt was the first to go of course. With all the skin she was showing up to that point there wasn't much covered up. Still the thought of my girlfriend's sister stripping down for me got me going.
The shorts followed and my camera followed them down her legs and off. When I came back up to her face she winked at me.
"I absolutely love being naked outside." She looked over me shoulder then said, "Follow me."
My camera followed that amazing ass a short distance then she turned and smiled at me.
"Why don't you put your camera over there?" She gestured at tree stump right next to her. "Then you can show me what you wanted to do with my sister that day."
That sounded perfect to me and when she got down on her hands and knees there was no way I was turning her down. I hurriedly set the camera down and knelt behind her. My hands quickly undid my jeans and moments later I was balls deep in that incredible pussy once again.
Fifteen minutes later the same camera caught my cock sliding out of her pussy dripping with my cum and hers combined. It also caught her face as she spun around to suck me clean.
As we got dressed Bonnie had a question that surprised me. "What's going to happen with you and Teresa?"
"I really don't know. We had a deal you know. When she wanted to go bi, we did it together. With you as the only exception."
"Really? And what did she say about that?"
"She said you were free game. I assume she meant she could play with you any time she wanted. But she had to include me too you know."
"I'm glad she did." Bonnie walked over to her car and asked one more question.
"Have you ever wondered if you're dating the wrong sister Eric?"
She was serious; I could see that in her face. I smiled and tried to play it off lightly.
"Pretty much every time your clothes come off."
That made her laugh, but I knew I'd hear that question again. And yes, I had thought about it the night before. Watching Teresa play with strangers had made me wonder a lot of things.
Bonnie was just as crazy, but I sensed something in her that told me she would have honored any agreement we had. I wasn't sure how something with her would play out though, so I put it on the back burner.
I checked the time and saw Shelia would be home. I wondered how that was going to turn out, so I climbed in the truck and headed over there.