Hobbit, it really is horrendous. My cousin is doing the same to his wife. I can't believe the person he has become. Although their marriage had problems he could have just left and been decent.
Instead he had an affair, lied about it when other people knew, treats her so callously, suddenly very mean with money and is trying to buy his children so that they will be loyal to him. The DC are boys and roughly the same age as your sons.
His boys see straight through him and are not happy. The eldest ignores him as much as he can but he buys the younger one which is utterly sickening. The boys try to put a brave face on it but have both got very angry and have on occasion broken their hearts crying.
He flaunts his new girlfriend in front of the boys. He was in their local pub recently where his son works pissed and showing off. I could kill him for that. It got back to me that his treatment of his son did not go down well with the locals.
Quite a few of his long standing friends have dumped him because of the way he is treating his family. His parents are not impressed either.
I feel furious on your behalf. I don't know the OW but I do know that her marriage was rocky and anytime they split she very quickly got with someone else. My cousin is just one of many it seems. I keep thinking he will see sense and behave decently but no. Marriages break down I know but his behaviour is just unnecessary.
I had my heart broken once and it was awful. I cried all day every day for months and then at least once a day for about a year. It was torture and I am so sorry to hear that you are going through this. There isn't really anything you can do but cry. It will ease in time. Would your GP prescribe some medication for you? I went on medication during a crisis and it helped me enormously. I took ADs and propanol for anxiety. I am not trying to be a drug pusher, it just worked for me.
I agree with everyone who says your Ex and OW may look like all is rosy but believe me their treatment of you will come back to bite them.
Keep putting one foot in front of the other and even though it is so painful hold your head up high. You probably think you can't get through this but you can, it's just very hard. You sound like a lovely person. Your boys will never forget that you always put them first. Best wishes to you x