Once Henry paid the check, he and Kirstin left the restaurant. The hostess winked at them as they walked out. "We should have invited her into the bathroom with us," Kirstin joked.
"Maybe next time," Henry replied.
They got into his car and he headed for home. They'd barely gotten out of the parking lot when Kirstin grabbed at the front of Henry's pants. "Damn, you aren't hard," she said.
"Um, yeah, that might be because we just fucked in the restaurant bathroom. And a couple times at the house before that. I'm fucked out for now."
"You are? I bet I can have you hard again by the time we get home."
"Bet you can't."
Kirstin stuck out her tongue. "You always were a brat."
"Me? You're the brat, kid. You've been a brat from the moment my dad married your mom."
"Kid? Does this feel like a kid to you?"
She took his hand from the wheel and guided it under her almost microscopic skirt. Henry touched bare pussy and felt his cock twitch, but he willed himself to stay limp. If Kirstin was going to play this game, he was determined not to let her win.
"Mmm, that feels so nice, Henry," Kirstin murmured. "Don't you like touching your stepsister's cunt?"
That caused more movement below Henry's waist. When he'd arrived at his dad and stepmom's house a few hours earlier to check up on the place while they were out of town, he'd found Kirstin in the family room with a dildo in her pussy. And he'd fucked her. The knowledge that he'd fucked his stepsister, that he'd crossed that line, was a total turn-on. And so was hearing the word "cunt" from that innocent-looking mouth of hers.
But all he said to Kirstin was, "Yeah, it feels nice."
Kirstin pouted. "That's it? It feels nice? You're playing a game you can't win, Henry. I know you're getting hard from having your fingers in my wet cunt."
Again a twitch. Henry was definitely going to lose the game if Kirstin kept this up. He pulled his hand away from her. "Maybe I am, and maybe I'm not."