Brian is very involved in Lukes life while trying to steer clear of Sarah because she is a melt. He is respectful of her as the mother of his child but she hounded him when they broke up, used every excuse in the book to contact him to get answers.
She went ballistic when she found out he was in a new relationship, even though she was supposedly besotted with Keith at the time, and the attention seeking started again.
All of this bullshit on instagram about her family unit is to get attention and a reaction from Brian, she blatantly puts up pre records of Luke with Keith when luke is with Brian, hoping Brian will call her out on it and she will get an opening to vent or to 'talk'.
Custody is sorted, Brian has Luke way more than is shown, after all Sarah is out and about a lot for someone who has a child 98% of the time, but Brian let's it go over his head and won't give her the attention she craves
Exactly, who is she trying to convince, us or Keith?