With my top off. You can look at my big tits for a whole day. Pleeeease?"Wow, I wondered if she was that desperate? What was I thinking? She's my sist...r. But those tits. To see those tits."Now you're just bullshitting." You think so?" She held the bottom of her shirt in each hand. And started to lift. I could see the swell of her soft belly. "So? Can I invite Rod over. And you won't tell?" Stop, we shouldn't. Mom. You're my sister. Can I really see them?"Knowing she had me. And being in need. ”I shook my head in dismay, but thought this would be a good time for a discussion that would impact both of us. I explained how I had made some changes in my portfolio to buy Searles Pharmaceuticals because they had marketed the new birth control pill. We talked about the pros and cons, ultimately agreeing that she would try it. I explained further that the pill was a sign of progress—medically and sexually.“If we don’t make some progress pretty soon…..” I could take the hint, lying back. Then I realized that this might be the answer to my prayer; if I could get him to accidently expose his erection again, it would be a natural way to bring up the whole subject I'd been dreading.David lept back up on the bed ready for more tickling. Normally I would have said something like, "Okay, let's calm down now and get ready for bed," but I decided to continue tickling him - devilishly! He was really having a good time and was squirming back and forth as he rolled this way and that trying. Chelsea , pulled me higher to suck on my breasts and kept her arm around my back so I wouldn’t get up. I felt the warm wet tongue swirl around my nipple and her free hand on my other breast, squeezing it. I was about the same size as her, but she could barely fit her hand around it. I felt my shorts being slipped off behind me and a finger near my clit, stroking. I tried to look at Jade, but I couldn’t see with Chelsea keeping me down. “Oh we’re going to have fun with you.” I felt a hand.