Should I tell child’s dad’s girlfriend he was sleeping with me when they got together?

[Mamabearandcub]

For around 6 months my child’s father was still sleeping with me whilst he had been in a new relationship with his girlfriend. I had no idea about this for those 6 months - I found out on social media last year. I was distraught. I did not tell her though, nor did he. We stopped sleeping together, he continues to be in a relationship with the girlfriend. I feel like what he did was very disrespectful to her - and me, as I wouldn’t have slept with him had I known he had been with this new girlfriend. Girlfriend now plays an active role in child’s life when child is with him however he refuses to let me meet her. I still feel wronged, and I feel like she has been wronged too. Just wondering what anyone else feels about this situation? Child’s dad says this woman is love of his life and I believe that, however I wonder if he’d still be sleeping with me if I’d not found out about her? We didn’t speak for a long time after I found out, he told her that I was upset simply because he had a new partner, but that wasn’t the case, it was the fact that he kept her existence from me while he was still sleeping with me. How would others feel if they were in the girlfriend’s position?

He might eventually but I doubt it will happen at all if you tell her what's happened in the past.

This happened to me with my son's dad. He was only 2 at the time and I didn't say anything about it for years but then one drunken Christmas 20 odd years later I mentioned it to 20+ year old son and he phoned and asked his dad about it not realising they were both there on loud speaker so now she knows.

Feels like she's done nothing wrong?
Leave it. If she has a role in your kid's life, at some stage you should meet. But only when you have no desire or intention of bringing this up.

You don't need to lie if she happens to ask you but I wouldn't tell her proactively. You don't know her personally so it isn't like it's your friend or sister, you didn't know at the time and it won't be happening again so morally you're in the clear.

No.