Abuse, desertion, failure to support. Are these perhaps encompassed in infidelity or adultery?
I’ve wondered, watching a friend collapse with guilt having separated from a truly vicious, sadistic, belittling and contemptuous spouse. I look at the woman taken in adultery, then hear sharia style interpretations of physical adultery somehow being magic, and a full spectrum of other oppression being OK. I guess I just don’t buy it, that narrow definition of adultery.
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.
See #43. Should have pinged you.