I'm seeing the effects on my late 20's sons here too. One has lived overseas for 5 years, one for a year, and the youngest is heading overseas in a couple of months time. I felt very lucky that they were all here (including the girlfriends) for Christmas and a week or two afterwards. In recent years, they have been busy focussing on themselves, their careers, their own relationships and friends, rather than their Dad being much of a presence in their lives. He wasn't able to be such a destructive force as when they were teens. Their time with him consisted of occasional meals, lasting a couple of hours at most - while their Dad presented them with his new superficial, glossy life filled with shiny expensive things. I completely understand that they want a 'normal' and stable father, especially when they have 50% of his genetics, and all of the potential implications that brings. And because he abandoned them as teens, they all seemed to have negotiated some sort of new relationship with him as young adults, while I got very used to not saying a thing, hoping for the best, while knowing the likelihood of them being let down once again, was a very real potential.
They seem to be pretty good at keeping him at arms length emotionally, and expecting things to only go so deep with him - a reasonable place to have your expectations at. They have given up trying to discuss things more deeply with MLC him, and it is clear that an apology to his sons will never exit his lips.
I noticed a shift in that dynamic this year. Their Dad suddenly seemed to want to reach out to them, not in any meaningful way for them, but for himself. He turned 61 this year and despite the gloss, his life appears devoid of anyone that could be described as genuine. So with them all being home, it meant a lot of negotiating dinners - as we suddenly had a lot of dinners to navigate around that he wanted the boys involved in too.
I initially assumed that maybe he was becoming more normal (after all, it has been 13 years), and perhaps was realising how much he had missed out on by going awol all of those years ago. Which meant that I spent time talking firmly to myself about learning to share the boys with him, when I had never really had to do that much before.
But sadly, the cracks quickly showed. The boys say very little - but the two youngest say enough for me to know that things are not great - their Dad's mood swings are huge, and he often makes them feel very uncomfortable, and they call him 'a grumpy old man' and they realise how his 'negative, controlling opinions have impacted them over the years'. One said that it's good that he can no longer aim that at me, and said 'someone else will be getting it now' - meaning the OW.
It is always reassuring to hear that I have always been, and will continue to be home for them. Even though it still makes me very sad that any of us had to experience this horror.
I find the girlfriends are the ones that will often tell me the most. Not that I have any interest in seeking information, just that they have a need to share their own experience with me, and in doing so, their understanding of how strange the shift in personality and behaviour must have been for us all, as they themselves have now seen the mask fall right off.
This happened when middle son's girlfriend said that her parents had sent a very small Christmas gift to my ex-H (I had been given a lovely gift box from them) and she said that she felt very awkward giving it to him, and instantly regretted it, as apparently he became very angry and verbally abusive, and told her to 'never, ever do that again'.
Luckily all three of the boys were there, and told their Dad to stop. She went outside and middle son went out to be with her and was absolutely furious that his dad would have done that to her (that same old behaviour we have all experienced since BD).
Apparently, my exH then came out to talk to her, no apology, no acknowledgement, but started quizzing her about unrelated 'stuff' in a happy happy joy joy way. She said it was so false and awkward, and she has never liked him or felt close to him, but had always put up with him for middle son's sake.
What a mess of their own (MLCer's) making. I had hoped for a happier outcome for my sons (in regards to their Dad).