It's wrong to lie to your girlfriend.
Jim has remained friends with his all his exes even though his girlfriend Jessica doesn't like it.
Jim wants to call an ex-girlfriend to see how she's doing.
Jim calls his ex-girlfriend and when Jessica asks who he was talking to he tells her it was his ex-girlfriend.
Jim calls his ex-girlfriend but when Jessica asks him who he was talking to, he says it was his mother.
Jessica tells Jim that she appreciates his honesty, but he knows she doesn't like him being friends with his exes.
Jessica doesn't believe him, and she asks to see his phone which causes an argument.