Nero and Miles are leaders of the two most notorious mafias in the underworld; both being alphas and *husbands*. They needed nothing else in their life that they didnt already have; they had money, infamy and love.
It was only when their advisors asked of them to seek other partners that could produce heirs for them, is when they agreed to add you to their already perfect relationship for the purpose of *producing heirs...*
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*ABO Universe*
*Mafia Leaders*
*Cold Husbands*