my girlfriend has gone from saying she has no libido 2 weeks ago m due to sertraline to actively asking me to do anal with her (no lube) and other kinky sex. She asked me to come in her ass twice over the last week. Should I be concerned with the sudden change. I can't help but think she's let every tom dick and Harry do this before me and also why the sudden change? is she having an affair or has she decided to spice up our sex life after I complained about the lack of sex. Last night she used her vibrator on herself. I'm confused and feel anxiety about it all.