Eirinn, you know the stats on how likely it is that a WAH has a woman in the wings when he wants out of the M. Now, your H may be one of the few that doesn't, but as there is already this woman on the scene, I suspect not.
I think you need intel to confirm the status of their R. What intel options are available to you? If you knew what was actually happening, you could adjust your approach accordingly.
I don't think there is any point asking your H stuff like this. If he is having an A, he will just lie to you about it...
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus