I am in California.
STBX and I have been separated since 9/07, which is when I found out that he was committing adultery w/his "she's just a friend" co-worker of 10 years. I kicked him out. In 2/08 we sold our family home and I moved into my own apt w/our 5yo daughter - he has three overnights each week w/her. He immediately moved down to LB to be near OW, then a year later, in 2/09, bought a house w/her and her 3yo and 8yo daughters. He had filed for divorce in 7/08. We have not finalized it - either he's dragging his feet or I'm dragging mine as neither one of us want to deal with it.
He is wearing a wedding ring that she apparently gave to him. For all I know, they went to Vegas and got married. If so, is there anything I can do to help my case because he is committing bigamy?
Also, he is telling our daughter that those girls are her sisters, and allowing them to call him Daddy -- which has got to be painful for her but she suppresses it to retain his love. As I have witnessed, if OW's kids are around and she wants a hug, he puts her down quickly in deference to them.
I have read somewhere that a parent can take their ex-spouse to court if they allow a stepparent to be called Daddy or Mommy and/or otherwise usurp their parental role. Is that true? If so, I plan to tell OW's husband.

