Michael Lohan’s former fiancee has accused the celebrity dad of physically abusing her throughout their two-year relationship. According Erin Muller, of Long Island, Lohan physically assaulted her at least 12 times during the union, including one occasion during which he kicked Muller in the vagina.

Lohan — a convicted felon-turned-Christian — has been arrested twice in the past six months on allegations of stalking Muller.

Muller filed court documents accusing Lohan of abuse after the following incidents:

Dec. 9, 2007 – Michael “slapped Erin in the face twice because Erin accused him of giving her a fake watch on her birthday.”

Feb. 2008 – Michael “punched Erin in the mouth” because she had a male friend on Facebook

March 2008 – Michael “whipped a computer cord” at her face but she blocked it with her hand … causing a laceration.

May 5, 2008 – Michael “kicked Erin Muller in the ribs.”

May 2008 – Michael “kicked Erin Muller in the vagina, bruising it and causing substantial pain.”

June 2008 – Michael “spit in Erin’s face, and beat her repeatedly with his fist.” Then he “yelled at her to ‘stop crying c*nt — other people will see you — if they see you, I will kill you!'”