Raising an only-child

I’ve dated two only-children in my lifetime.  One was the stereotypical only child, spoiled, lack of social skills and an introvert; however, I married the other one.  Nonetheless, I distinctly remember the first saying that he absolutely hated receiving games for 2 or more players as an only child.  My daughter is an only child and I can’t see this changing anytime soon.  So, why have I purchased 3 new games for Madame that requires 2-4 players!  Don’t worry we do play them with her but hopefully it doesn’t highlight the fact that she doesn’t have any siblings.

If you’re an only child or have only children is there anything else I should avoid or do?  She’s very independent and appears to be content.