The Delivery Man (2013)

Vince Vaughn is one of the few actors that could pull this plot line off.  The story is that when he was a young man, he sought a way to earn enough money over a short period of time to bank roll a trip to Italy for his entire family.  His parents had planned to honeymoon in Venice, but not only were they not able to afford it when they were married, but it wasn't until his mother was diagnosed with a terminal illness that they attempted to remedy that oversight.  So how did he do it?  He made almost 700 sperm donations, that is how.

So now, years later, he comes to find out that he has fathered almost 600 children--who have filed a class action suit to reveal his identity.  Simultaneous with this his girlfriend discovers that she is pregnant and he is under close scrutiny as to his ability to be a functional father to his most recent child.  Up to this point, he has not really contemplated fatherhood, and suddenly he is overwhelmed with a bevy of young adults, as well as the task of convincing his girlfriend to allow him to participate in the raising of the current baby, all the while trying to preserve his anonymity.

His response to all the stress is to 'accidentally' meet some of his biological children--what he discovers is that he is really interested in them, he is surprised by the diversity of who they are and the talents that they have, and he wants to be involved with them.  He becomes particularly fond of a son who is severely disabled, and in the guise of his 'adoptive' father, he goes to a meeting of the larger group, and suggests that even without a father, they are all half siblings and should have a relationship with each other.  It is a very funny idea for a story that is as well carried off as possible.  Not too deep, but I found it diversionary.