Let Cassie go

You glance at Troy and back to Cassie's eager face. You sigh. "Why can't she go out?"
Troy bristles. "Because it's the rules!"
"I get that babe, but she's eighteen. Let her live."
Cassie seems about to explode, she's bouncing up and down excitedly. "Please, please, please, please, please Daddy!"

Troy looks at you and back to Cassie, his resolve waning. You decide that you really want to help your stepdaughter out. You lean up, whispering in your husband's ear. "Let her go out. If she does, there'll be no one at home tonight to hear us."
You can see the resolve on Troy's face cracking and after a few more moments of quiet bickering and negotiation he sighs and throws his hands up in the air, a little annoyed. "Fine! You've convinced me. You can go out tonight Cassie. But, by God, if I find out you've broken any of our rules about drinking and boys, you'll be grounded until your thirty eight."
Cassie shrieks and nods. "I'll be good! I promise. Thank you Daddy!" She hugs Troy and then wraps her arms around you, pulling you into a tight hug. "Thank you so much Allie!" She skips off, happily calling her friend to tell her the good news.

The rest of the day passes as any other Saturday does, the two of you moving around and doing your own things, together. You can tell that Troy is annoyed at you for countermanding you, but at the same time, you need to form a proper relationship with your step daughter, and she is eighteen after all. Until later in the afternoon, when you begin to prepare for this party, selecting something to wear.