With my ex, I first did take the high road, saying only that he sometimes made bad decisions when he did some disastrous fuck-up that I couldn’t sugar-coat. I did this, I realise now, as a reaction to my own mother, who bad-mouthed my father so outrageously that it helped to destroy any relationship I might have had with him, though to be fair he drove the nail in that coffin, I wasn’t pre-disposed to think nice things about him either.
Eventually, my son was a mess from that. If I didn’t defend myself the things his dad said about me must be true, right? The final straw was during a scream-fest from my son, about 10 at the time, about how I’d never paid child support when he lived with his dad, which he did for about a year. They had to eat Ramen noodels for weeks! His dad was going to lose their apartment and they were going to have to sleep outside and starve and die! Dad told him that I didn’t care if they starved! Dad said that I hated him (his dad) and that I’d let Son starve and sleep in the streets if it meant Dad had to! How could I be so mean?!?
I simply pulled out all my receipts which had his dad’s name on them, the amount and the date, laid them on the bed and walked out of the room. Mostly, because I was too angry to say anything constructive.
We had a big tearful talk that night, and I agreed to answer any question he had about what his dad had to say about me with either that it was true, not true, or that it was partially true. I also said that there were some things that I would not deny or confirm, if they were too personal for me to talk about, and that I reserved the right to decline to answer. I told him he’d have to be happy with that, because my relationship with his father was grown-up business, and not his.
That’s worked for us. His dad still bad mouths me outrageously, and I have had to cop to ‘that’s true’ a couple of times (not as often as the other options) and I have to stop myself from explaining because that would just be me trying to justify things. He’s 16 now, and his relationship with me is pretty strong. He has a decent-ish relationship with his dad, which is what I wanted. He understands his dad has his own problems/issues/perspective, which is fine, and that I do as well.
So that’s worked for us. The thing I would have done differently is to have done it from the start, because my son had a lot of very big problems by the time I stopped covering for his dad lying to him.
Because I am able to speak to my ex I did call him on the behaviour as well. I tried to have a drink or something first, so I could just be all matter of fact, which was kind of passive agressive to be fair, he prefers me to get angry and yell so he can act like I’m unreasonable. I just said things like, “You said X to Son. X is not true, and you know it isn’t true. I told Son that what you said was not true, although I didn’t give him any details. Please stop doing this, it isn’t helping and it is hurting your relationship with Son.”
I think I said that a billion times, pretty much (I said it just two days ago, in fact.) He’s conflict avoidant, so he has to go pretty soon after I say anything like that, but at least he knows that I know and that our son knows.
But as I say, this only works if you cop to things that are true that your ex says, even if they are unflattering unless you’re refusing to answer altogether.