A man who isn't the father of the child proposes to a pregnant woman in order to preserve her honour in a society with strong views on extramarital sex. Whether this is a suitable basis for a happy marriage largely depends on the work's idealism. If it happens nowadays, the guy either has a very strict sense of duty or is just in love with the woman and making excuses. Also, expect his actions to be criticised for implying that a single mother can't raise a baby alone. Sister Trope to Shotgun Wedding, when the father is pressured into "doing the honorable thing". Examples: