Things were great at home since I had started buying Abby. For the past few months every time Abby need money she came to me. I was happy to keep giving her money, it was more than worth it to fuck a babe like her. We had both become more relaxed about it and I could tell Abby was actually starting to enjoy it a bit. A couple of times I even made her cum.
One night, when Abby went out with friends, I was disappointed she didn't come to me for money so I just turned in for the night.
I was woken up in the middle of the night when someone flicked on my bed side lamp. It was Abby. She was on my bed next to me, naked, and pulling my covers off me while kissing me. It took me a moment to shake the sleep off and look at the time.
"Isn't it a bit late to be trying to get money?" I asked her as she pulled my covers down exposing me naked in bed. My cock was already getting hard and Abby reached down and started stroking me.
"Actually I'm just horny, how about a freebie?" I could tell Abby was drunk but I wasn't about to argue. I rolled Abby on to her back and put my head between her legs. I could smell her sweet pussy as I began licking her. My tongue moved over her lips, I found her clit and rubbed my tongue on it. Abby was moaning as I licked her out.
Mom and dad were asleep in the next room and I was worried they might hear but I was having too much fun to stop.
I stopped licking her pussy and moved up her body. I kissed her. Our tongues twisted together, she must have been able to taste her own pussy in my mouth. I slid my cock into her wet pussy and she put her legs around my hips and pulled me into her. I fucked her and sucked on her nipples. Abby was moaning and wriggling, her orgasm building. Her moans were getting very loud so I kissed her again to muffle the sound. She push her mouth against mine and started cumming. I felt her pussy tighten around my cock and I came with her.
"Thanks mike. As brothers go you're not too bad." She giggled as I got off her. We laid together for a fews minutes.
"You should go back to room." I waited for her answer. I looked over at Abby and saw her asleep next to me, I guessed the alcohol had gotten to her. I pulled my bed covers over us, switch the lamp off, cuddled up to Abby and fell asleep.
The next morning I was woken by Abby getting out of bed. She picked up her bathrobe off the floor, she must have dropped it there last night, and put it on.
"Morning babe, leaving so soon?" I asked. Abby looked at me with a little smile.
"I'm not your 'babe', I'm your sister. I think mom and dad are up, I need to get back to my room without being seen." She opened my door a bit, made sure the coast was clear then went.
I stayed in bed a while then got up, put a t-shirt and shorts on then went to get some breakfast. It was a weekend so mom and dad were home. Mom said they were meeting some friends and would probably be out all day. By the time I had breakfast and showered they had gone so I decided to go and see Abby.
I knocked on her door and walked in. Abby was laying on her bed on her front. She was resting on her elbows reading a book. She was still wearing her white robe. She looked up at me and smiled. "Hey sweetie."