Seems unlikely, unless he went back to work for the company paying the pension. Even then, if he was working as a contractor (which seems most likely), that most likely wouldn’t affect the pension payout.
I think mom is just looking for more cash for whatever reason.
Moved from MPSIMS to our advice-giving forum, IMHO.
I’m really sorry you’re going through this, what a difficult and unfair situation to be in.
I have to wonder, why does your mother feel she should still be supported by your father?
OP: you should file paperwork for emancipation. Leave the forms laying around where your parents could inadvertently see them should they visit.
I’m pretty sure this is no longer a concern for the OP. 
I don’t think your in the middle quite yet. You’ve talked to Dad, but Mom has yet to mention it yet. I wouldn’t say anything to Mom if I were you, and if she brings it up keep responses to a minimum saying “I don’t want to get in the middle of it” and “That’s between you and Dad” a lot.
But it might make an impression on the 'rents.
Tell your Dad to calm down and hire a lawyer. She has a shit case, and I think the letter is pure bluff, and only proves that she’s got a friend who’s a lawyer.
He should sue for his legal expenses and claim malicious harassment by her, in my opinion. He should print off every document like her facebook entry, etc, before hiring a lawyer.
Tell you cannot lie under oath, just can’t do it. So the truth will out, if you are asked. The rest is up to her.
She’s still getting her cheque, she just wants more, because he’s taken a job? And she imagines the court will see it otherwise why exactly? Her children are gone, they’ve been divorced for years, I don’t see that she stands a chance, even without your testimony.
Sounds like it will indeed get ugly, I’m sorry this is happening to you, it totally sucks. Keep your head down, and do just what you’re doing, stay the hell out of it, in every way possible. I wish you luck, do keep us updated, how it unfolds!
There are states (Massachusetts is one, NY may be another) where the divorce laws allow either member of a divorced couple to go after the other’s money for essentially the rest of their lives. Even if the kids are now all adults, even if the divorce happened 20+ years ago. The only thing that prevents in (in MA) is that once you remarry, you can’t try to get more money out of your ex. There have been attempts to reform the laws in MA, but apparently the divorce lawyer lobby is pretty powerful here.
I’m 63. My advice: do not take sides and refuse to discuss this situation with either of them Let them do whatever they have to do. There is NOTHING to be gained for YOU to allow yourself to be pulled into this. There will be emotional bloodshed, but you do not have to be a party to it. I would suggest you just say that over and over again, “I refuse to be pulled into this disagreement. It’s between you two.” Then hang up the phone or leave the premises if you have to. People can be such idiots.
Yea, I agree with everyone here who’s said something to the effect of, "Mom, I will not lie for you. End of discussion." and “That’s between you and Dad, leave me out of it.” and “I refuse to be put in the middle of this. Work it out yourselves.”
Sorry that your parents are behaving this way, OP.
This is a good start.
Other than that, inform each of your parents that you will not discuss the situation. If you’re called for a deposition you’ll cooperate, truthfully, but that anything else is out of bounds. If either of them tries to discuss anything, even peripherally related to the issue, hang up/walk out/stop reading the email. Don’t let someone say, “just listen to this one thing” or “you don’t understand, I’m just trying to give you information”. Don’t put up with anger directed at you. Don’t be either one’s friend: you’re their child even if you’re an adult.
It’s not easy. Don’t let curiousity draw you in. I’ve got a situation within my family which I refuse to take sides & discuss. At one point every single person has been mad at me : “you’re not even listening! You have to!” Now, they just leave me out of it. It’s one of my quirks.
Also, this business of one parent calling you and telling you to tell the other parent something… bullshit on that right now. Just say, “I’m hanging up now,” and do it.
I’d go as far when telling your mother that you won’t lie for her what you see the truth as. That she has been in a committed relationship for years. That she owns property with her partner. She may think that when you tell the truth, you’ll stick to the legal truth, that she didn’t remarry. I’d make it clear to her that if she pursues this path, her choice…and your father chooses to defend himself, his choice, that your truthful testimony may not work out to her benefit, or even maintaining her financial status quo.
She sounds immature, and it isn’t nice to blindside your own mother.
This is their problem, not yours. Don’t let yourself get sucked into it.
Sounds to me like that’s all he needs, considering he’s the one with the truth and she’s the one attempting to steal from him.
I’m so sorry you are in this unpleasant situation.
I cannot agree enough with the other posters who have said to stick to your guns and limit your conversations on this topic to “that’s between you and Dad/Mom.” You could say ONE TIME to each parent (it sounds like you already told your dad) “I will tell the truth of what I know if compelled in court, but that will be the extent of my involvement.” If either parent tries to come back with more details, more explanations, anything related to this issue, that’s when you cheerfully change the subject or, if that doesn’t work, hang up/walk out of the room/don’t respond to the email.
Even trying to find out the letter of the law where you are … I can imagine you must be curious, but then again, YOU aren’t trying to collect any money, so if you can do it, just drop it. You don’t need to know. The more information you have, the more involved you have let yourself become. Let that stay between your mom and dad.
This.
In the long run, your mom is doing your dad wrong. Honor and integrity dictate that you tell the truth about what you know and let the chips fall where they may.
I don’t get why you’re not taking sides. Your mom is effectively trying to steal from your dad.
You mention in the OP that you stayed with your mom, so perhaps you have a stronger relationship with her, but it feels like there’s a right and wrong here and your mom’s on the wrong side. Tell your dad what’s going on and tell your mom that you love and support her, but that you can’t stand by as she tries to steal from your dad.
If her relationship is as public as it sounds, then surely there are other witnesses that he can call who aren’t related to his ex-wife. Supply him names or screen shots of FaceBook profiles, but ask him to please leave you out of it. Nothing good will come out of it. At the end of the day, it’s between the two of them.