A few more minutes of the heavy make out and grind session, Im feeling much bolder now. Dawn has relaxed all defenses and seems to have forgotten that...Dave is in the room with us. Im taking full advantage of this with one hand up her shirt and the other rubbing her crotch. Her nipples are erect and now sensitive to every touch of my finger. I put Dave out of my mind and lift her shirt high enough to cover her left breast with my mouth. As Im sucking her nipple she moans even louder this time. Me and my sis are very close so I asked her a movie as it is leave for me also . Without knowing my intention she agreed and it was evening show I booked a Hollywood movie because the crowd will be less and changes of sexier scenes are more. this is my first step of seducing my sister. as expected in the theatre there was not much crowd and only pairs are sitting everywhere. We took a corner seat where I booked. after the movie started my sister was constantly looking to the back seat to know. She was very open and honest about it but now that she was pregnant, she said fewer men were willing to date her. “You would think that I’d be very popular with the guys.”“Why is that Angela?”“The thing is, guys don’t have to worry about getting me pregnant.”I grinned a sheepish grin and said, “Apparently not.”"Have you ever had sex with a pregnant woman, Liam?”“Never.”"You need to try it. Some women like me get horny when we are expecting.”“Is that an invitation, Angela?”“I didn’t expect it to. I have to wear these? These look like something a three year oldwould wear. They even have little teddy bears on them. Don't you haveanother pair?" Nope," I lied as he headed off to the bathroom to slip on the hated set.I guess the ruffled panties were a bit much but it was his last day so Iknew this would be my last chance at revenge. Mom also insisted that hewear the one remaining skirt I had packed for him with a coordinatingsummer top. There was no mistaking him for anything but a cute.