She needs a phone she carts my son around. Theres zero chance I will leave her without a phone while shes caring for my son.
And there is zero chance that a woman carrying on with another man will allow herself to remain in a position of not having a phone for more than 3-4 hours.
Whatever you decide to do (and I certainly don't think you should enable her affair by paying for the cellphone that she uses to help conduct it), TELL HER, calmly and confidently, what you've done after you've done it. There's no point in making a stand and then hiding from it.
"Please be aware that effective tomorrow morning, I have decided that I'm no longer willing to pay for your cellphone. I'm not going to enable your affair any longer, so you'll need to make immediate arrangements to get your own phone and plan." (You should have already have phoned your cellphone provider, and given them a cutoff date of tomorrow morning, before telling her this).
I would also encourage you to cut off any other ways in which you are financially enabling her affair: hair, make-up, ISP, etc. Let her know you will continue to pay for the family's NEEDS, but not her WANTS. Err on the side of paying for things (ex.: insurance), but start with the obvious stuff like the ones I've mentioned here.
