Everyone loses a husband, wife or child at one time or another. We all lose our children. It's just whether we lose them before or after we go. Perhaps you're holding on too tightly to your teenager. The wrong move can be so treacherous.
Decisions regarding marriage can really be rough.
There are cases where the husband philanders. He carries on extramarital affairs with one woman after another. Even Jesus said that in such a case that maybe you should let him go. On the other hand. Ask him in prayer what you should do.