Lindsay Lohan’s dad, Michael Lohan and his girlfriend Kate Major are expecting a baby together.

A source tells TMZ that Kate is currently on her first trimester, and Michael has not yet broken the news to his daughters (well, now they know!).

The couple has had an on-and-off relationship. Major has been linked to Jon Gosselin and has her own frequent pass to rehab. The former Star Magazine writer also issued a restraining order against Michael Lohan a few months ago.

The baby is due at the end of the year. There have been no comments yet from the Lohan sisters.