Didn’t click through.
I wonder if he demanded the same, and whether she refused, but I refuse to play by clicking (I’m not that curious).
I will state, however, that based upon my conversations with younger females (daughters of coworkers & neighbors), males 17-25 today warrant her demand.
She’s just as likely to cheat as he is. Maybe even more.
It sounds like she said it as a joke, then he added it to the agreement.