Ramadan : What would you do if your dad marries again?

Like he no longer wants to be with your own mother for no good reasons since she has been faithful and he marries another woman who's even more religiously strict??? And you live away from your mother for years now and your mother is at a age of less likely to be married!? I feel terrible if this happens because although I would respect his wishes I still want my mother to be my only mom!!! Its like shirk calling someone else or looking at them as another mother. I rather see them as aunty but it seems like my dad had tried to replace her with all the woman in his lives but never had been successful(break up/no longer together).. How do you handle this??