Should I invite my father's wife's daughters to the wedding?
Here is the backstory, it'll make things complicated so you'll know my dilemma.
My father cheated on my mom with someone, my mom found out and divorced my dad. Two months after the divorce was final, he married his mistress. This was almost three years ago, and after they got married, we moved in together. A few months later, the mistress/wife kicked me, my sister and my 6 month old nephew out because her daughters lied and said we stole their stuff (nothing was stolen they just didn't like us). My father, instead of sticking up for his own flesh and blood, sided with her, and let us get kicked out.
Now, I'm getting married April 10th, and I've agreed to let my father bring his wife to the wedding, only because they are married and she's his guest, not because I like her. Well now, my idiot father is telling me I have to invite her daughters, the ones who lied to get me thrown out, to the wedding because they are "his stepdaughters."
I think he's being completely ridiculous, he knows I hate them. What do you think I should do?