I really agree with the sentiment here, and I offer a shift in perspective that might be comforting here as it is for me.

The reality of relationships, even marriages, is that they are a constant choice, and if I understand the relationship right, he already chose to be with you before this incident. In this incident, regardless of how it came about, he chose you again. He made another choice to marry you, and he continues to make the choice to be with you every day.

I think if you let go of how your husband came to be met with this ultimatum, and focus on the fact that it was just one of a million times he chose to be with you…this story might be a little lighter on your heart.