Your mom is an idiot ! And a bitch! And she can go **** herself !!! Sorry you have to put up with that, OP. Not all people can be good parents . I don't care how drunk she is, being born is never the child's fault!

I hate to be that guy but whenever they are drunk they just say what they think

It's okay, my mum tells me this when she's sober. She still doesn't understand why I get so upset and don't want to even bother being nice to her after she says stuff like that :/

Tell her to stick to water!!

Tell her you're sorry for having her as your mother and that you like your grandma better

Best thing to do. Sarcastically apologize while sarcastically going on about the logic behind it. "Oh gee sorry for something I have no control over, that you in fact have more control over. But since I am the fucken outcome I guess it is my fault.. Sorrrrryyyyy!"

Tell your Mom to appologize because the best part of her ran down the crack of your granny's ass.

Tell her to apologize for spreading her legs.

should have told her "sorry that you couldnt keep your legs closed and it resulted in me"

Such an apology should be carefully worded. May I suggest: I am sorry, very sorry indeed, that you're my mother.