Do i get back or just try and forget it?

we live in a smll house with one bathroom. i got out of the shower and my mom walked in on me while im fully nude. she came in just to get shirt she didn't even wear! i told her that it was wrong of her to barge in but she said, "it wasn't a big deal since she saw me nude when i was younger." now i'm mad at her! i want to walk in on her to embarress her and then say, "it's ok, i saw u nude when i was a baby!" but then she would get super pissed! what should i do? just forget about or what?