Why does the husband call his ex-wife when he is drunk? Is it because he regrets marrying me or can't forget his ex-wife, or other reasons?

This is human nature. People always have a hidden side in their hearts. When they get drunk, they get confused. Maybe she doesn't love you and she can't forget her ex-wife. Maybe it's just a little bit of consciousness, because after all, people who have lived together for so many years always have a feeling of affection. Or maybe the old knot hasn't been opened yet. If he still loves you in every way in his daily life, then the landlord need not worry too much.