In Madhu's case though, there is much more to consider than just that. Because she is Rk's wife, I don't find it wrong for her to try to bring back his faith in God (specially since he already was an ardent devotee earlier.)
She is just breaking Rk's rules and I like that. 😆 Rk's house is her house too, and if she feels like bringing Ganpati in her home, she can do so for herself too. [yesterday Rk acknowledged that Mb was part of his family, his home.] Rk made Madhu his adhi adhuri biwi and even if she is a servant, she has rights too... Jo haq se na mile, aur woh hamara ho, woh cheen ke hasil karne mei harz hi kya hai.. I hope Madhu doesn't bow down time and again.
Marriage requires many compromises and I think, people tend to test each other's limits when they are settled in a relationship to see where the other can give... Some people even change their religion to get married, others can respect each other's faith and have a very successful marriage. I think it depends on each person individually -and his choice- and there is no right or wrong.