HELP WITH STRICT MOM ASAP

Okay so long story short I was FaceTiming this guy that I like last night and eventually I fell asleep FaceTiming him. He never hung up so this morning my mom comes in my room (shes extremely strict on boys btw) and shes like WHO IS THAT WHAT ARE YOU DOING blah blah blah so I’m half asleep like he’s my friend I fell asleep etc. so she storms out of my room and leaves for work. This morning she calls me like “We are having a long long talk when I get home young lady” and I was like why and she said “you know exactly why. You should not be FaceTiming boys late at night and you know that” anyways I feel very guilty even though literally EVERYONE does this. I need some good things to say to my mom tonight so she won’t flip out on me so much.