The tempting thing is to shoot the mother, but that, or bad mouthing her, won't do you or the kids any good.
Buy 'em the clothes, and continue to pay. And continue to look forward to the day when you can tell her what you think of her.
that actually happens many times, where the good daddy is so good that he just kills mommy and the kids, just so his little ego can feel like a big man...
how telling of you that you suggest shooting someone....