When the OW is his mother

[Allen A]

The thing is DFMIL, your husband once bereft of parents will simply find someone ELSE to run to... most likley infidelity will arise instead...

When things get difficult wtih YOU, they can't deal solo and run for support... if their parents aren't there they will go to someone else instead... another woman, etc

AND.. your H's parents passing WILL put a HUGE straign on your spouse too... so much that they may have an affair as a means to DEAL wtih the LOSS of the PARENTS...

Staying power is what's needed, if they can't find that, they are always going to be a flight risk