I misread that at first to say "Maybe upgrades to build a grandparent?"

I know this isn't what you meant, but I actually would LOVE to have grandparents in the game! ...and teenage girlfriends for the boys and boyfriends for the girls who might or might not end up getting married for the next generation! Is this a possible upgrade or is it too monumental to even consider??

Well, I'm turning 60 this week, and I sure as heck don't walk like that, either! Gees!