What @lakeswimmer said.
I wonder if the mother was single and had got pregnant via sperm donor, would she be called selfish? That's knowingly raising a child without a father and, in most cases, the woman won't be cushioned by billions in the bank.
So the woman has chosen to have a child with a man, who hopefully will be in the child's life for a little while, who has a large family for support, and all the parenting help they can pay for. What's disgusting about that?
The real reason for thr revulsion is the idea of an 89 year old adult having sex with a 44 year old adult, isn't it? Well that's just agism and, guess what, no one is making you shag him.
The vomit faces are bloody awful. Can you imagine if the mother read this thread? Also, if people could stop propping up the misogynistic idea that if a younger woman is with an older man, it must be that she is a sort of prostitute after his money? We already face misogyny from men, is there any need for us to help them perpetuate it?