Oh Steelers sorry you are out of basic items is that because of funds or you didn,t manage to shop?
Could you not keep in that long life milk for emergencies or powdered. You have ever right to feel cross that he treats son to eating out and doesn,t bother about his own daughters/ or you for that matter.
Your son is behaving very badly to IMO and I hope you let him know that you are a family and that they support each other and stick together in difficulties, but then he is being v selfish to.
This may be an odd question but does your H actually like women? Did he have any women collegues or friends he gets on with or likes and respects them?
I am not suggesting for one minute he should treat OW well but she does put a roof over his head etc and yet he speaks badly of her and he treats you and your daughters with little respect.
Glad you have been keeping busy and enjoying doing things.
I guess for now thats all you can do.
I hope you are not going to be cooking for H tomorrow and making him favourite things after him feeding himself and son and leaving the girls and you out.
Take care.