Figuratively, her's is! She just told me "I'm Air B&B'ing a condo in Florida in January with my sisters". I told her "Awesome, have a good time, I'll pop in for a long weekend, and oh, yeah, I just booked a week at Steamboat with Bryan." She asked me which boyfriend Brian, or Bryan?, I told her the pilot one, lol.
It's just how our relationship has worked over the years. She's always been very close with her sisters, as I am with my friends. The kids are grown/independent (college junior, highschool senior). We've learned things like holidays and Thanksgiving aren't worth fighting over. We used to fight over it, but now that we've been married for 22 years, it's actually much better.