Where can I watch Joint Custody in United States?

Happily married for fifteen years, Zuzana finds out one day that her husband has been having an affair with another woman for a long time. Zuzana does not hesitate and decides to visit her daughter-in-law Lenka and make her an unconventional proposal - she suggests that she share the care of Jirka and turn him into a man for a change. Lenka finally agrees and both women introduce this new way of life to Jirka.