So, he was still being a dick during couples therapy. That reads as though he was not remorseful and not ready to do everything he could to salvage your relationship/marriage.
The trust is gone and you’ll never get that back to the same level as before. You still don’t trust him as you believe they would meet up again to feed their egos.
I think you need to focus on therapy for yourself to explore why you’re thinking about subjecting yourself to his possible abuse again, after having separated two years ago.
Although leaving a relationship is courageous and admirable in these situations, that must have been hard. What’s the current pull for you now? Future financial security for the DC?
Future financial security for you?
It’s not all about money, but finances are increasingly strained for most right now unless you are comfortably well off.
What do you miss about him?
What is the point of him?
Do your children want to be a family unit, all living under the same roof again?
Are your DC old enough to understand why you are separated?
I’m impressed that you left.
Five years is more of a double life than a fleeting affair.
You’ve already managed the initial hard part to separate two years ago with children in tow. Dig deep within yourself to work out why would you want to go back to him and all that entails, especially as he was not remorseful enough or ready to do the work 18 months ago.
Love and/or familiarity is not always enough. Plus, the kids will see the cracks and may eventually resent both of you for getting back together to ‘save’ the marriage.
I decided I needed to focus on myself and set some quite firm boundaries, and did that for about 6 months which helped me heal. Maybe we need to revisit this.
I would suggest you return to focusing on yourself and continue to reinforce your firm boundaries. I would suggest individual therapy just for you.
Hopefully, you’re just going through a blip.
Love yourself more.