Tables of Multiplication
Twins are uncommon, but not improbable. A set of twins marrying another set of twins is much more uncommon, yet it does occur frequently enough. What truly absurdism this circumstance is the fact that both married sets of twins have their own twins.
This is a question we’d like to put to a mathematician or someone: what are the exact odds of anything like that occurring? We can’t imagine it being more than 1%, however we are not qualified to make that determination.