How can some men manage to have second secret families?

How can some men manage to have second secret families?

As in, not just having mistresses, but outright marrying them (bigamy) and having children, essentially having second full-fledged families.

When I departed back for the US, my mother joked I was "going back to my secret family" (she likes talking crap like that, does the same for my sister) but moral implications aside, having two families, even without the burden of secrecy, sounds like a logistical and all-time comsuming nightmare.

I mean, I have the financial means, but I barely have some free time between work and dedicating quality time to my family, how do these men manage to do it all? How do they manager to keep the secret, and give assimingly satisfactory time to both their wives and respective children?

How can some men manage to have second secret families?
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