Assalaamualaikum
My parents have been having marital problems for many years (poor communication, arguments, etc) No effort was made by them to sort it out. My father (70yrs) then recently got secretly remarried to a woman half his age. He told my mother after a few months of doing so. She is devastated. We all are devastated. He is in the the tabligh jamaat. He says what he did is sunnah.
I told him that while having 2 wives is sunnah, the way he did it is far from sunnah. Surely he is supposed to try to sort out his first marriage, and if not succeeding, then to at least explain to my mum that he is going to get married again because of their problematic marriage. Am I correct?
Perhaps this would have made my mum really make an effort to make the marriage work. She was given no warning, no chance to even try