Michael Lohan My Baby Mama's a LIAR 'I'll NEVER Leave Kate'

7/22/2012 6:20 AM PDT

Mark this day for the history books ... Michael Lohan has gone on record to tell TMZ ... "I'LL NEVER LEAVE KATE MAJOR."

TMZ caught up with MiLo at LAX  last night and we asked him about his alleged baby mama Kristi Horn ... who recently ripped him a new one​ and called him an absentee father who owes hundreds-of-thousands in back child support.

MiLo explained his side of the story (here's a hint: DENY, DENY, DENY) but more importantly, he took the opportunity to defend his relationship with Kate and tell us he's in it for the long haul.

Talk about JINXING it.