But he probably won't say no.
He will hum and harr and somehow... nothing will change.
Don't pick up on the one positive 'he reversed it' reply and cling to it.
Your history with the MC and all... you want kids. It's obvious.
It could be your biggest regret if you just drift with this one.
He's happy to see you drift... to have his family 'in the bag', to know you don't, and to happily keep mum on it all... That's not good.
You MUST raise it with him asap and be direct. Would he have a reversal? Not 'consider' it. Would he, and when. Don't be deflected. If he tries to deflect, that's your red flag that he cares much more about his welfare than anything else.
He would not be ok with you having a baby with another man's sperm? Well you live every day with him have children from another woman's eggs, so I suggest you put that option very firmly on the table and remind him that like it or not, it is a resonable approach, if he doesn't want the parental responsibility of another child. You're giving him the option to be your kids' father if he wishes.
Don't put yourself second to his comfort and wants in life or be subtly manipulated into doing so.