To contribute to the dialog about BL flying back home.
They had a significant physical, frightening, altercation. One that drew police attention, the public's attention. One that forced Brian to either accept accountability of his actions even though he may not have been blamed by the police. He certainly blamed Gabby. He may have been resentful of the negative attention it brought toward him. All the possible things that could have happened. They both might have been sent to jail or perhaps him. Now, instead of cooling off he is brewing within himself.
Perhaps He reaches out to his parents, perhaps calls his sister. Perhaps they suggest he comes home to cool down. Perhaps <modsnip> they offer for him to come home and they can discuss things, <modsnip>, and go back and work things out with Gabby.
He might have wanted to make sure the things he wanted or Gabby wanted were taken out of storage. Or he was ready to move on when they arrived home. One way that the parents may reconcile their actions is to taken into consideration conditions that they believed were out of of Brian's control . That he was dealing with his situation the best he can. The <modsnip> visit would help temporarily.
<modsnip>. Giving Brian the break he needed was their way to help him. They had no idea that he would do what he did.
Then, suddenly, He must have spoken to them to expect him home. Mom changed reservations before he arrived home. They knew or assumed he did something or separated from Gabby, <modsnip>
For me this kind of response and point of view from the parents makes more sense that accounts for the motivation of their behavior. They don't seem to be victims of their sons over-the-top behavior and never responded in a public display of frustration but from a perspective of knowledge of their son and knew how to respond accordingly.
Perhaps, to them, It was not BL that did what he was accused of. <modsnip> Only they understood and will hold firm until the right time has come.