Lindsay Lohan's dad, Michael Lohan, having another baby

Lindsay Lohan's going to have a new brother or sister.

Lohan's dad, Michael, is having a baby with his on/off girlfriend Kate Major, TMZ reported.

"According to our sources, Kate is in her first trimester," TMZ reports.

But the site also points out there has been a restraining order against Lohan having contact with Major, and the two are not supposed to see each other.

"The restraining order [Major] had against [Lohan] was lifted lifted only a few weeks ago ... so the act of conception was illegal," TMZ says. The site has previously reported that the pair has accused each other of violating the restraining order preventing Lohan from seeing Major after each party had accused the other of abuse.

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Michael Lohan

Back in April, Lohan told Radar Online that his gal pal was scheming to get pregnant, saying, "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." He added, "Kate is flat broke and facing a lot of charges right now. She's been showing up every place I am! At the hospital, at my house."

But Major then told the site that Lohan was a "sick, old man" who was "stalking" her.

TMZ says a rep for the pair confirmed that Major's pregnant, but wouldn't comment further.