Friday morning we skinny dipped again after Mom left for work. Indy actually came out again and we had a nice threesome in the water. It was fun to float on my back as Indy stood between my legs and fucked me. Cathy had a turn and again we let him cum on our faces and made out as we cleaned each other off. After breakfast Indy practiced his oral skills as she and I lay side by side on his bed and talked. I didn't want it to end but she had an appointment at one o'clock and so left about noon. Once again she dropped Indy off at the University. I tidied up and watched TV.
Cathy called me after a while to tell me that her mom wanted some "special time" and promised to see me tomorrow, Saturday. Then around two o'clock Indy called to ask me to pick him up from campus. I changed into a nice summer dress of off-white linen. I wore no underwear at all. The look was sexy without being too revealing.
When he hopped in I smiled and kissed him. "Ready for your next lesson?" I asked. He grinned and nodded. "Good, now as I drive I want you to touch me. Don't grope. The point is to gently arouse your lover without being rough or crude. The secret is in the subtlety."
Indy started by touching my hair and cheek. After a few minutes he moved on to my shoulder and my arm. I wondered if he would go for my breasts next but no, he turned sideways in his seat and used his other hand to caress my knee and leg. Throughout the drive he never touched my breasts or my inner thighs and pussy. I put the car in park and told him how well he had done.
"You really surprised me," I said. "I didn't think you could hold back, but you did!"
He smiled and only then noticed that we were at the mall, not home.
"Come on," I smiled broadly. "We're going shopping!"
"Now listen. You are going to learn several lessons today: One, how to shop with your lady. Two, how to act when out with your lady. And three, how to dress nice enough to get ladies." I stopped and pulled a bank envelope from my purse. "It would be best if you were seen to pay for everything, so here is some cash. Next walk with your arm around me. Not lewdly on my ass but casually on my waist. Yeah, that's good. Oh and don't worry about being recognized as brother and sister. It's unlikely we'll bump into anyone who would know, and if we did we'll just pretend it's normal. No one will suspect. "
Indy suddenly switched sides, I looked puzzled and he explained "Oh yeah, the gentleman has to be on the outside, or danger side when walking his lady."
It made me smile.
We went in and spent a nice couple of hours shopping. (I had called Mom to let her know that we were out for the evening and might catch a movie.) I tried on a lot of clothes and modeled them for Indy much to his delight. I only bought a few things for myself. We went into a nice place and I made Indy buy himself several pairs of chinos and slacks with a few nice shirts and a new pair of decent looking loafers.
"It's time to start dressing like an adult from time to time..."
We then went into the lingerie store where I sighed as I looked at the nice bras. I did pick up a pair of garter belts (one black, one white) with matching panties (I passed on the uncomfortable g-strings) and several pairs of stockings. To this I added one sheer black lace top and one white lace teddy.
Indy was noticeably uncomfortable during all of this. The fact that the saleslady kept grinning at him as he paid made him blush.
Finally we went to the candy shop and we bought some dark chocolate truffles for Mom.
Next I drove to the Chicken Shack.
"What are we doing here?" Indy asked
"Well Mom won't touch fried chicken so when I want some it has to be when I'm eating out. It would be cruel to bring it into the house."
I used the drive through and we took our chicken and drinks to the park and had a little picnic.
"Indy I want to, no, we need to talk."
"Okay, is it about Cathy? Because I understand if it makes it awkward..."
"No bro, it's about you and me. See, I started this because I felt sorry for you. Then I did it because I lusted for you. But I want you to know that from now on, I'm doing it because I love you. I don't know why I forgot that, but I have always loved you and all of this time together has reminded me just how important you are to me. Yes, I will do as I said and tutor you in anything and everything I can. And yes, I will be your lover for as long as you will have me, regardless of who else comes into our lives. It's important to me that you know that. This is a secret we must carry to our graves. No future spouses will tolerate our relationship so it must be private."
"Yeah, I get it." Indy said. "The same thing occurred to me. I know what Cathy said but I also know that even those in society who might participate or secretly approve, can't openly support incest. And I know it will never change. But yes, I do want to keep on being your lover. God it sounds so... erotic to say it out loud. Incest. One of the big social taboos, and here we are, doing it. I watched you growing up and always thought you were pretty. It wasn't until you forced me into this that I realized how badly I wanted you."
We kissed and lay back on the grass and kissed some more. I felt his hand on my leg and he stroked my thigh. Gradually getting higher and higher. There was no one close around the spot we had selected so we felt comfortable with a little heavy petting. I relished the touch of his hand on my inner thigh and spread my legs little by little. When he finally reached my pussy and found no panties he was surprised.
"When did you...?"
"I never had any on. All day. Nothing under this dress. At all."
Indy smiled, "Damn Leia! I had no idea! Why?"
"Well why not? I find it arousing. And it arouses you too, now that you know, right?"
"Yeah, of course!"
"Then in the future you will have to wonder when you look at me, if I have anything on under my outer clothes... and that is why."
We kissed again, far more passionately. Indy kept his hand beneath my dress and finger fucked me until I couldn't stand it.
"Stop!" I said and amazingly he did. Immediately.
"Why?"
I sat up and took his hand and sucked my juices off. "We can't fuck here and if you keep on I will have a screaming orgasm."