Chickens Out

Lexi is sitting there looking at your cock. She moves up to you and puts one leg across your body and hovers above your legs. She remains fixated on your member. You use your left hand and start rubbing her pussy to get it ready. your reach up with your right hand to her breasts and start rubbing it too. You look up to your sister and she seems very distant, still staring at your penis.

"Are you ready for me?" You feel she is wet, her nipple is equally aroused. Yet she doesn't respond. Diddy comes up behind her, kissing her neck. You and Diddy keep playing with her, trying to get her out of it. She doesn't really respond. Maybe something else will get her attention. You take both hands and bring her right up against your shaft. Diddy reaches underneath Lexi and lifts her up a bit. You place your cock against her pussy lips and start spreading them to enter her. "I'm going to fuck you now Lexi..." Her breathing seems to increase a bit.

"Hear we go Lexi!" Diddy starts lowering her onto your cock.

You begin to enter your sister and feel how tight she is. Then all of a sudden she seems to wake up, and starts looking around, she lifts herself off you and twists herself around. Pushing you and Diddy away.

"What's the matter Lexi?" You ask.

"I... I gotta get out of here."

"Lex, this was the plan, remember?"

"I just can't do this right now. I'm not the slut you are." She gets up and starts to try and walk away.

"Lexi, don't go!" You call after her and get up. "Let's talk about this."

"I can't, I need to go take a shower."

"Let her go John." Diddy holds on to you. "She'll be fine, she just chickened out this time, it's nothing new..."

"What?"

"We've been trying to sleep with you for years. This isn't the first time she's gotten cold feet." Diddy blurts out. "I just didn't think she was going to after she got naked."

"What, you've been trying to fuck me?"

"Yes, you didn't think all the teasing and everything was just an accident did you?" Diddy asks in a teasing voice.

"Uh, maybe at worst you were teasing me."

"And the times you've could see up my skirt or down my shorts with no panties?"

"I just thought I was lucky and you were overly relaxed..."

"For an intelligent guy, you were pretty stupid."

"Fuck, I'm done missing opportunities..."