"What's going on down here?" Tina had rushed downstairs in her cotton PJs. She looked her husband up and down and couldn't resist a giggle. "Oh, Hi Br...an!" she continued, lightly. "I see you've met our new Au Pair?"Brian returned a withering look. "Yes, we just introduced ourselves."Annoyed, Tina turned back to Ken, "I must thank you, Kathy! For arranging this rare meeting between my husband and me."Brian set his jaw, "please don't, Tina." Don't what?"Brian paused for a second, trying to decide. ”I didn’t react, so she continued, “You like your sister’s arse? Grabbing it on the stairs, then spanking it in bed. Well?”“Ermm,” was the best I could come up with.“I think you should say sorry and kiss it better.”I looked at Laura, who looked right back at me. Neither moving or talking, neither showing any expression. Then I jumped onto the bed behind her, taking hold of her hips before she could get away. There was no fight or struggle from her, she wouldn’t have moved if I had done this in. -A few hours later, she must have called Liza and told her the news, because I get this text from Ethan:What happened, dude? Want to come over?Hell yes, I want to come over.-When I get to his place, his concerned expression causes a new wave of guilt and self-loathing to flood over me. My dick, however, knows nothing of such things, and so, with a non-committal shrug, I pull my sweater off over my head. I see him taking me in. His eyes travelling down my chest, like molten lava. Warming me,. Once I made it up to her lips she instantly grabbed my head and started kissing me. After a little bit she rolled over onto her knees and started sucking my dick while he was fucking her from behind. A couple minutes later and she whispered to me she wanted me to fuck her, she laid on her back and I got on top of her and she forced my cock in her pussy, didn't take long before I wanted to cum in her, wow did that vagina feel good.It felt like there was a rough spot on the upper part of her.