Too Close for Comfort (1980)

S2E16 My Unfavorite Martin

Muriel discreetly requests her mother Iris to remain with her during her recovery from giving birth, much to Henry's annoyance, as he has always considered Iris to be too controlling. However, when Muriel unexpectedly confronts her mother about her relentless criticism, the responsibility falls on Henry to resolve the situation. In the midst of this chaos, he uncovers a significant secret about Muriel that changes everything.