No. failure to support definitely not a cause in either case. Abuse may demand separation, but divorce for that is not in God's repertoire. If the mate is heathen and wants divorce, let them go without complaint--don't abase yourself by clinging to the other. But remain unattached. Remarriage is not God's plan if you want to stay close to Him and get His support; and for sure, one-night stands are not a part of it either. Or for your children.
All this has sound, clear instructions on marriage from the NT pastoral letters.
I don’t buy it. I see this used as a weapon for the most vile people to beat their spouses into chattel. Diversion from worshiping God is often termed adultery. I think the definition is broader that sexual infidelity.