Michael Lohan and Kate Major

Lindsay Lohan will be a big sister again as her dad Michael Lohan has impregnated his on and off girlfriend Kate Major.

Michael already has several kids, including daughters Lindsay and Ali and sons Cody and Michael with former wife Dina.

While Kate is said to be in her first trimester, it is believed conception occurred during the time she had a restraining order against Michael, 52, meaning it was illegal for them to spend any time together.

It is unclear if any charges will be pressed for the breach of the order.

Michael didn't tell his children, including troubled actress Lindsay, that they can expect a new addition to their family, they reportedly found out through gossip reports.

Kate was granted a restraining order against Michael last year following months of arguments between the couple, many of which turned violent with each accusing the other of assault.

However, in April Michael claimed Kate was trying to get pregnant by him.

He said: ''I was in the hospital with kidney stones and Kate just barged in! She's been taking ovulation tests trying to get pregnant from me.

''She hates the fact that I'm doing so well, that I am getting close to Dina and the kids who hate her, and can't stand the fact that my mum and sister came down to visit me and Kate was unwanted.''

Kate, meanwhile, has previously called Michael a '' sick, old man'', adding ''he is a liar and because I want nothing to do with him, he has been stalking me and I finally HAD to take action again.

''I have emails, pictures and witnesses to disprove all of his desperate and pathetic claims, plus a permanent order of protection which he constantly violates.''

© Bang Showbiz