I'm at the other end of the spectrum... a legacy to no org. My mother's family is from overseas, and my father's family is anti-greek. No one in my husband's family joined a social GLO either. Well, my hypothetical future daughter will be an AEPhi legacy!
I think it's sad when parents twist their kids' arms to join their org. One of my pledge sisters has an aunt who's an AEPhi, and she only allowed her daughters to apply to schools that had AEPhi chapters. None of them actually went AEPhi. (The aunt was at our initiation and gave her pin to her neice, which was nice, but still, her daughters might have been happier at schools that they were not allowed to consider because there was no AEPhi chapter there.) At some point... you have to let your kids choose their own path.