I'm going to curse at a bigoted woman in front of her kids
Why are you so bitter that you would curse at her?
She is homophobic and I'm very angry at her prejudices.
That sounds frustrating. But you shouldn't curse at someone in front of their kids. Maybe a private conversation with the mom would be less harmful to her kids.
Their kids need to know that what their mom is doing is bad.
Don't you want the kids to learn about the world in a positive way? It might scare them instead to see you cursing around, so why not kindly tell her and the kids why the behavior is wrong? I think they would appreciate that more.