I do think Jennifer was just a pawn in the real fued between Mariah and Tommy. I don't think it was a case of Tommy and his evil sidekick J-Ho scheming on ways to sabotage Mariah's career like some fans think.
Mariahd definitely had a problem with J-lo around the Glitter and CB era because she was the face of the ploy that Tommy was behind. Mariah no doubt put it behind her when she came back strong and it was clear her career wasn't over come the 'TEOM' era, and probably even more over it when J-lo's career went down the crapper.
So I do believe J-lo when she said there was never any fued on her side.