The entertainer reportedly felt that Bryan was spending too much of her money on expensive items like clothes and jewelry, and that he was using her for fame.
Bryan was reportedly jealous of Mariah‘s friendly relationship with her ex-husband Nick Cannon, who she spends a lot of time with for the benefit of their children.
When Mariah went to the Kids’ Choice Awards with Nick and their twins, Bryan allegedly felt “disrespected” and demanded that she come home for the event. This was reportedly the final straw in their relationship.
Source: Just Jared