So this chick to my partner and his sidings are really close with

This chick rubs me up the rong way completely and she doesn't take much notice of me when we are around her

She also has a son that's very spoil and get pretty much anything he wants (I dont mind him but his demands and tantrums I cant stand)

My birthday is coming up in next week I'm having a little getting together with my friends (party) but I dont want to invite here I don't want here to step foot in or around my house. My partners siblings are all coming as they are all my friends

And another thing she cant handle her alcohol at all she turns into a crying baby which I cant stand as well

The only thing is I'm feeling very guilty for not inviting her and feeling rude not to

I DO NOT WANT HER AT MY PARTY I cant stand her but I dont no what to do. my partner said hes leaving it up to me as he knows I cant bear her and he backs me all the way