Mom blew my phone up

I’m almost 25 years old and stayed the night with my man and our kiddos had a sleep over.

Midnight rolls around and my phone is BLOWING the fuck up. My boyfriends like uh you’re moms calling you.

I text her saying im hanging out busy. She replies “no call me now” so I did. She wanted to know if there was a “code word” and I was like dude no I’m going to sleep bye and hung up.

Is she crossing the line? Even today she’s like “I’m your mom” worry blah blah

I’m 25 years old. I feel like she’s overstepping. And all she keeps doing is making me feel bad for not wanting to tell her about what I do when I do it.