Ah OP this is a shit place to find yourself. I’m sorry you are having to deal with this.
I think you need to consider the facts
Your husband left you in the past, told you he didn’t love you but then changed his mind and came back
He doesn’t value your work as a SAHP.
He doesn’t believe he needs to or should take any of the care for his kids.
He doesn’t tell you when he’s spending time with another woman. (No problem with having female friends but it’s just basic respect to ensure your partner fees comfortable with it - he doesn’t see this)
When you talk about not being comfortable with the 121 with this woman he tells you you’re crazy - he doesn’t even entertain an adult, sensible discussion where you can be reassured. He immediately chooses to gaslight you and play the “you’re insecure / crazy” card. Highly manipulative and unfair and not something a decent person does.
Try to take your emotions out of the picture for a second and look at these facts and think to yourself logically - is this the behaviour of a good person who cares about their partner.
Is this the behaviour of someone who respects their partner and sees them as an equal?
Or is it the behaviour of someone who doesn’t give two shits about anyone but themselves and will do exactly as they please and if anyone questions them they will throw insults and accusations at them to shut them up?
No one deserves to be treated this way OP. You know that, now what is your next step?