A wife’s responsibilities towards her parents

The responsibilities of a married woman towards her parents
are like those of any other woman. The rights of the parents remain
both before and after marriage, but obedience to the husband takes precedence
over obedience to the parents if there is a conflict. 

If the command of the parents conflicts with the command
of the husband, then what takes precedence is the command of the husband.
But the Muslim husband and the Muslim wife must strive to avoid conflict
with the parents, and strive to achieve harmony between them and their
parents. 

One of the matters to which the married woman should
pay attention concerning her parents is that she should strive to visit
them from time to time, and give them appropriate gifts even if they
have no real material value. She should try to avoid letting her children’s
misbehaviour annoy them when visiting them, and avoid telling them about
marital disagreements. 

Shaykh Muhammad al-Duwaysh 

If her parents need money and she is able to spend on
them, then it is obligatory for her to spend on them as much as she
is able to. If she does not have money of her own, but she intercedes
with her husband, if he has money, to help her parents, then she will
be rewarded for that in sha Allah. This is part of honouring her parents.