URGENT HELP NEEDED

My mom walked in on me doing my business while watching.... stuff. Please tell me how I can save myself from what's about to happen. Joke wgera kahin aur jaake maarna. I'm scared as shit rn.

I've already been walked in on once by my dad, when I was 12. Shit did NOT go well. I was treated like an outcast in my own home for 3 months.

I've told her not to tell my dad rn, and she hasn't yet. They've gone out for some shopping. Idk if she'll tell or not. If she does, it's over for me.

She's already said "sabkuch delete karo agar mera muh dekhna chahte ho" (delete everything if you ever wanna see my face again).

She's very conservative and religious, aaj mujhe aarti bhi nahi lene diya after seeing me jork my shit. Please tell me how I can make her understand that it's not that big of a deal. Please please please. I'll kill myself if she hates me, and if my dad finds out, I'll get trauma so bad I won't be able to focus on my studies for the next couple of months.

UPDATE: Mom said she won't tell dad, but will talk to me about this tomorrow, when dad isn't home. My dad works in a nearby city, and therefore only comes home for the weekends. He will leave tomorrow morning, and won't be home for the week. Thanks to everyone who said they'd pray for me. I'm not scared anymore, but I still feel very guilty for disappointing my mom. Idek how I'll face her tomorrow.