islam always teach to obey the parents specially the mother, but it doesnt mean that u have to listen to whatever they say, there are things we could ignore, such as things that could mislead us from Islam. when ur parents ask u to do a prohibited (in islam) thing then u have all the rights to ignore it (without hurting them, just ignoring). if he is too concerned about his mother n islam then he would have cleared the issue before marrying u, now cant talk about obeying his mother's word n all. the rules of islam is very simple if u understand and very complicated if u dont.

good luck to you both!!!