You told her you would continue to support her emotionally and financially while she is living in YOUR home with OM.
I am sorry, but I am going to be blunt here. You aren't making yourself look like the best option. They are probably kicking back with a bottle of wine in YOUR home laughing at how you are supporting their lifestyle.
I am sorry, but leaving the family home was not the "strong" option. Unless you had to do it for yourself because you couldn't live with her. You did that because you hoped she would see what a good guy you are by leaving the house and letting her have what she wants.
I know you are trying, but you have a defensive remark regarding everyone's advice trying to prove you are going about this the right way. Listen to what these people are telling you, they are trying to help.
