Multiple sets of multiples

Ok, here's a scary thought.
A few weeks ago, I was at the DSM airport and the flight attendant told me she knew of someone who'd had two sets of twins.
The day before that, I was at Walmart and ran into a woman who'd had two sets of twins, back to back.
And then yesterday, I was at the mall and ran into a man who was a triplet and who had three sets of twins, back to back.
See the pattern? I seriously hope this isn't a sign. Don't get me wrong, Logan and Taylor are a lot of fun, I just don't know if I could do this again.
And here's the scary thought... it could happen again for us. Logan and Taylor are identical twins, which happend just by luck, but fraternal twins run in families, and they run in mine. =O