Kate Major is slamming her ex-fiancé, Michael Lohan – accusing him of weaving a web of lies, womanizing and shockingly, punching her female friend in the face, RadarOnline.com can exclusively report.

Michael is currently undergoing treatment, in front of the cameras, for “anger management issues” on the VH1 hit show Dr. Drew’s Celebrity Rehab, and it seems that what Papa Lohan lacks in the star power department he is more than making up for with his drama quota.

PHOTOS: The Lohan Family Album

Kate and Michael have had a volatile relationship, to say the least, but, Kate alleges things turned really nasty yesterday after she refused to partake in a therapy session with Lohan at the Pasadena Therapy Center.