It seems the cracks in Lindsay Lohan's relationship with DJ Samantha Ronson are really revealing themselves.

The relationship came under further scrutiny after the couple had a public row at a Dubai club, which left Lohan sobbing during the early parts of the morning while Ronson chatted up a storm with her pals.

A friend told The News Of The World: "Lindsay is on the edge more than ever before. She is completely broke down.

"It was a cry for help from Sam and once again she just turned her back and ignored her."

The shouting match comes after their relationship took initial strain when Lohan revealed that she was not gay.