MLC or just an EA?

[MrBond]

Your H could be going through a MLC.

If he denies contacting her, then tell him that you know differently and are disappointed in him. That all you wanted was honesty to re-establish the trust that the two of you have together.

Then end the conversation. You let him know you are disappointed in him, but don't push the issue. Calm and cool. Let him think about how he disappointed YOU for a change and not the OW.