Who: Marc Anthony
Fail: Word on the street is that Marc Anthony became furious when he found out about J Lo's new boy toy. This could be a rumor but it's not far fetched because you know how some people can get after break ups. If Mr. Anthony is indeed upset about his ex moving on to the next one, all we can say is that given J Lo's track record this shouldn't be a surprise.
Redemption: He has a reputation for being insanely jealous over Jenny from the Block, so it might be best that he just lay low and send a middle man to communicate with J-Lo whenever it has to do with the kids.