Lindsay's Illegit Sister -- One Mo' Lo?!

6/27/2008 7:46 PM PDT
Now we may know why Michael Lohan was hanging around Lindsay Lohan's set yesterday -- to butter her up before today's bombshell dropped about her so-called mystery sis!

Michael wasn't too happy to talk about his possible bastard daughter from an affair back in 1995 -- when he was still married to Dina -- but it's definitely time to get outta L.A. and get a freakin' paternity test already.