The older you get the more you'll treasure moments like this. My girlfriend will occasionally throw something ridiculous into sex, which we both laugh about until we can't breathe. For instance: I had a cat when we first started dating, who was not fixed. Before she got fixed she would always "present" (that's where a female cat assumes the position), and while doing so let out these agonizingly cute "chirping" sounds. Imagine it as rolling your tongue with increasing pitch, as if asking a question. Years later, we still have the cat, she no longer does that weird shit, and all is well. Until one night, while having sex, my girlfriend perfectly mimicked that chirping sound knowing full well that it would destroy the mood, but make me laugh. I can't remember every time I've had sex with her, but I'll never forget laughing with her that night.

All I'm saying is, you'll be happier if you own it, and laugh with her. :)