Caught him lying again, talking to past sex partners

Juliette
I caught my husband lying about porn. I don't mind porn, it was the lying. He told me he would give me open access to everything to hills my trust up. Which I hate.. but I still looked. He's had a Facebook group (like an actual group with a name) just him and two girls he slept with separately and together in a threesome. He knew how insecure I was about them being in contact as the women are still swingers despite being married now. He was the only one posting in it too.. with them just liking or commenting. It was mainly weird jokes or memes.. one was sexual. He has hidden it for years.. I feel cheated on almost. Betrayed. He says he will do anything to fix it but I feel like nothing can be done. He knew how much this would bother me and hurt me but did it anyways. I'm not sure what to do. I'm half way through our first pregnancy together and part of me wants him to just leave but I'm scared to do this only own along with my other two children. Everything is tense and awkward in the house and I am so unsettled.