I decided, or rather my dick decided, that now was the time for Mum's meat injection. I positioned myself above her wet, gaping hole. My shaft was so ...stiff that I didn't need to guide it in with my hands. My arms were fully stretched either side of Mum's shoulders. I watched her face as I entered her for the first time...and probably the last. That first thrust went in all the way to the hilt. Mum turned her head to the right and kept her eyes closed. But I thought if she bit her bottom lip any. .. I never had it there before is all..." Your cherry bum," I said low, "is no more...never anymore baby..." I chuckled as I drew back slowly, and slowly began fucking her tight butt. "It's mine now, so relax and enjoy it; the first time is usually the worst..." I began slapping her full ass cheeks, alternating slowly, getting a little harder eack smack."I don't know if my knees are going to hold out much longer she whimpered, as they shook beneath her. "Let go, I'll move with you, " I said. I was nervous, but at the same time, I was ready to see one and to touch one. I was done not knowing what the hell I was doing. Tonight was my night to learn, and I was going to take full advantage of that. Before I could say anything further, he pushed my hand and his through the front part of his pajama pants and let my hand go as my fingers brushed up against his cock. It was warm and soft and I could not help but reach in further and wrap my fingers around it, which caused my dad to jump. Her face flushed, and her head flew back, her coochie clenching my hot rod. All around me sex exploded in the back of the van, a welling started up in my balls, rushing out. Liza bucked away, and I came free from her pussy; my come flew free on her flat tummy and bouncy boobs. “Oh, yeah, we’re coming here too,” I cried out. “Yeah, well we’re about to pull into the parking lot. I suggest you put on a shirt,” Kara laughed from the driver's seat. “Really you can get naked as soon as you get into.