I disagree with sickofffrozen.
I don't think that you are under any obligation, whatsoever to forgive your husband. He betrayed you. Repeatedly. For months.
The fact that you decided to stay and work on the relationship is not a decision that, once made, you are bound to forever, or that switches the onus of responsibility for making it work onto you rather than HIM.
Look OP, my last post wasn't very clear, but here is the cliff notes version:
I think you have every reason, and every right, to bring this up again.
Firstly, and most importantly - because it really does sound like he is bullshitting you about what happened. How the fuck are you supposed to "move on" from lies and a gross betrayal, when the reconciliation is based on a lie? And, just as importantly, when the information that you were given before you decided to stay in the marriage - was also a lie.
If he can't even tell the truth about cheating on you when he admits to it (by "softening the blow") then, well really what the fuck can you trust him on? If his honesty only extends so far, but not all the way, then you bloody well shouldn't trust him.
None of this is your fault. The fact you decided to stay in the marriage does not mean that all of a sudden you simply have to shut up and put up.
If he didn't want to be in a marriage with a paranoid wife who doesn't trust him, then he should have thought about that before he stuck his cock in some other woman.