I would like to extend my appreciation for Thinker's sensitivity toward this matter. Recently, there has been a fair number of topics started by people with newborn babies. It's been either the woman whose partner wants to open the relationship and/or pursue other relationships, or the other partner who wants the mother of their child to accept non-monogamy in some way. These cases tend to feature selfish stubbornness in the non-mother partner, and a great deal of distress and anguish in the partner who is the mother.
It is refreshing to see someone who wants to do this for the other person, who is willing to listen to other people's advice without getting defensive, and is willing to let it go if the other person is not into it.