Why is my dad sending sexy messages to women?

[Lynn V]

If your mom is truly bipolar, then your dad is living in a marriage with a mentally ill woman. That can be incredibly lonely. When one partner is so unhealthy, the other may have to seek affection and sex somewhere else. Your dad is suffering too, so he takes his suffering to another woman rather than destroy his wife and marriage. Although it is a mystery to you why someone would use this way to cope, it is not unusual. There is no point in telling your mom. Your dad has a right to love and be loved, and if your mom’s mental illness prevents that, then he is doing the only thing he can do to deal with it.