My mom is disappointed in me. Revealing the truth isnt always rite I guess

Few days back I lost my v card to a classmate from my uni. She offered, it was rlly hard to say no.

I'm very close to my mom especially. I share everything with her. whether good or bad, I'm very open with her. My mom isn't hesitant to discuss a lot of stuff with me either.

I had hesitated at first, because I didn't know how to phrase it properly. So around 3 days after my hookup, after dinner, I told my mom I had something important to tell her. I told her lightheartedly and in a happy mood, I slept with a woman.

Instead of her being pleasantly surprised, her face turned into a scowl and got angry instead. She said am I stupid go sleep with some random woman who I barely know? Then goes onto tell me that I've disgusted her & disappointed her. That what type of son am I? She told me to leave the room & not to talk to her agn

Its been a few days and she hasn't talked to me properly again. Whenever I try to go & apologize to her & explain my actions & why I did it, she tells me to get lost & doesn't make any eye contact with me. Like rlly bad silent treatment.

I don't know what I did wrong other than sleeping with someone. I tried explaining to my mum that I couldn't control my urges for once.

I rlly dun understand why she's mad at me. I had expected she'd take this news as a surprise, and either tell me smth like I shouldn't have done it, but instead she's hating me for it. It's been like a few days alr that she's so pissed at me.

I thought being open with her even about this would be good, but instead backfired. Regret telling the truth