I won't lie. This annoyed me.

I start escalating after a fun date of drinks and pool. She tells me we can't have sex as she's on her period.

I decided to shrug it off and told her to let me know in advance next time. She was quite apologetic over it. And says she kept quiet about it because it's been a while since she last saw me (almost 2 weeks). And didn't want to wait until her next days off because of shark week.

What's the RP way to respond to this?