To get the "Ask to Move In" option in the "Friendly" pie menu, you have to socialize using available options in the "Friendly" menu until you see in the social dialog box in the upper left corner of your screen, "____ thinks ____ is being friendly".  To get an option of any kind of proposal in the "Romantic" menu, you have to socialize using available options in the "Romantic" pie menu until the social dialog box reads "_____ thinks _____ is being extremely irresistible" (at the very least, ".....alluring"). The relationship between two sims does not have to be 100% to "Propose Going Steady" as long as one sim has already confessed his/her attraction for the other and you see a heart under his/her picture in your friend menu.

Don't know why, but for some reason I felt compelled to have the Wolffs and Landgraabs switch spouses. I now have my Wolff-Landgraab household and my Landgraab-Wolff household. I feel my decision was pretty warranted, too. Morgana and Thornton weren't really compatible to begin with and Nancy & Geoffrey are apparently blood relatives of some sort since Nancy's maiden name was/is Landgraab. No wonder Malcolm's so ugly (at least in my game).