Hello D. M.
I am married, a MOM of 3 and I am 30. I had a blended family when I was growing up. From what I can tell you (I could be wrong) but I treated my stepfather the same way so I kinda have a good idea on what is going on.
I do not want to hurt your feelings in anyway!
BUT SHE HATES YOU!!!
AND SHE WILL UNTIL SHE GROWS UP.
She feels that you are taking her DADDY away from her.
She wants her DADDY and MOMMY to be together.
You did not do anything wrong. This is just how a child sees it.
She might also be jealous of the relationship that her DADDY has with your children.
If she is allowed to do what ever she wants whenever she wants then that tells me that her MOMMY does not pay enough ATTN. to her, and if that is true and she sees you giving lots of LOVE and ATTN to your kids that might make her jealous more.
You have to talk to your boyfriend first about how she treats you, you also need to sit down with the girl, her mommy and your boyfriend and tell them all that the next time that she treats you with disrespect that you will CALL HER ON IT in front of anyone at anytime because you are not going to allow this to continue anymore, you are not trash and you will not allow her or anyone to treat you like that. Your children are not allowed to treat her or anyone like that and that is what you are going to be looking for from her for now on!!!!!!!!!!
Tell them all that you will not give in to her nasty looks or smart remarks. Let the girl know that her daddy is always going to be her daddy, but he and you are also going to be in a good healthy relationship and that you would like it if she would join into your blended family with lots of love and respect for each other.
This is going to take time and lots of understanding from your part about why the girl is acting this way.
REMEMBER SHE IS HURT ABOUT THE DIVORCE.
(LETS SAY THAT THE GIRL MAKES ANOTHER NASTY FACE TO YOU INFRONT OF OTHERS AGAIN, AS SOON AS SHE DOES IT, LOOK HER STRAIGHT IN THE EYE AND SAY TO HER OUT LOUD IN FRONT OF EVERYONE, SAY HER NAME " ____ DO NOT LOOK AT ME LIKE THAT AGAIN I DONT LIKE IT AND IT IS NOT GOING TO BE ALLOWED, DO YOU UNDERSTAND WHAT I AM SAYING TO YOU______. "
Talk to her with a sharp voice but not to loud. Keep a straight face do not make a nasty look at her.
Oh and another thing that might help after you have a talk with everyone, ask her mommy and daddy if you can spend more time with her (just you and her) so that you too can try to make a friendship bond. She might not want to at first but after one or two times spending time together she might start treating you and your children better. Keep spending time with her. IF you feel like that might not work then INVITE the girl to come with you and your daughter for a day out (GIRLS ONLY DAY OUT) she might start to warm up to you better, and if she does go along with you and your daughter make sure that you talk to your daughter first before you leave alone that you want to help the other girl feel comfortable so that you are going to divide your time with them equal.
It is up to you on how you want to handle this,
Good luck and I hope that things work out for you and your family.
From one mom to another
Mrs. S