Diddy Claims Cassie cheated with Alex Fine

Okay,so Cassie recently revealed her new boo,Personal trainer ,Alex Fine who according to reports was hired by Diddy to keep her fit while they were dating.
Some sources claim that Diddy feels betrayed by Cassie,that she was hooking up with the Fine lad while she was dating Diddy.

What do yáll think? Do you think Diddy has a right to be mad? Meanwhile he ws dating Cassie and having kids,so who is really bad here???