Reports of The Voice judge partying it up with two women at the Darling Hotel upset his former supermodel wife, because their children were sleeping in an adjoining room.
"Seal can do what he likes, except when the children are there," a friend of Heidi's told the New York Post.
"Heidi and Seal have not finalised their custody agreement, and this may be brought up."
Seal had brought the young women up to his room after a meet and greet at the hotel's bar, leaving their respective boyfriends high and dry. After the men started causing a scene, the hotel's security ended Seal’s party prematurely so that they could calm down the girls’ upset partners.
Seal was also reportedly spotted getting friendly with a brunette in a bikini on July 4 while the kids were spending time with their mother, but his camp insists this is unfounded.
"That is absolutely untrue and a complete lie," they snapped.