And it is also his wife's house. Women usually like their children to feel welcome in their home.
The poster didn't suggest that the stepson living there was a major problem, just him having overnight female guests. And a recent college graduate is not just some bum living with his mom for too long. No doubt he intends of starting his own life.
Although as I ALSO pointed out, if it looks like he might want to overstay his welcome, and his wife is backing him on the “no female overnight guests”; that would definitely “light a fire under his a$$” as far as motivating him to move out on his own.
that does not change what i said... if he makes it too comfy for him, a short amount of time may grow into eternity... if he wants female bed guests, and is not able to do so in that house, this may motivate him to get out sooner...