What is the ruling on accepting an invitation from one's parents if their house contains pictures, and does this ruling differ from accepting an invitation from non-parents in this situation? And should one decline to accept their invitation if they do not remove the pictures after being asked to do so, knowing that visiting them in their home is the only way to maintain ties with them?

Filial piety is obligatory even if parents are disobedient, and the presence of pictures in their home does not negate their right. If the pictures are permissible, there is no problem. If they are forbidden, this does not prevent visiting them. Some scholars have mentioned that it is not forbidden to sit in places where there are forbidden pictures. However, they should be advised to remove these pictures.