Lopez's move has not gone down well with A-Rod.
"He found out, and they had a huge fight", the insider told Us. "But they're working through it".
However, Lopez made a decision to ensure an eye was always kept on her boyfriend as she was anxious about her four-month romance.
"She's really into Alex and wants it to work". So she is trying to control as much as she can, ' the source explained.
Look at me! She also shows off her body in the music video Ni Tu Ni Yo
Despite the trouble in paradise, the couple seems to be head over heels in love, and last month JLo gushed about her beau calling him a attractive person and loving father to his two girls.
Earlier this month, J. Lo told Extra that her beau is "a lovely person" and a "loving father" to his daughters, Natasha, 12, and Ella, 9, whom he shares with ex-wife Cynthia Scurtis.
"He's a generous human being with his family, with his friends, with me", Lopez told the outlet. He is caring and sweet and capable and responsible and just all the lovely things you would want a man to be.
It sounds like the feeling is mutual as the man stated he is having a great time with the "amazing" J.Lo. who he claimed is one of the smartest human beings he's ever met and also an incredible mother.