Not a BC Violation Question

[rainmaker]

This feels like a backcourt violation question, but it's not.

7th grade girls. B scores. A inbounds and is coming up the court against heavy pressure. Neither team is very skilled. At about 8 seconds in the count, just above the 3 point line in the backcourt, B gets a hand on the ball. It starts pinballing from player to player among 2 or three girls from each team. A couple or three of these girls are standing in the front court. They also get hands on the ball. It is finally controlled by A in the backcourt, and brought painstakingly into frontcourt.

Coach B wanted to know why there wasn't an over-and-back call. I said ball achieved frontcourt status when B3 touched it in the frontcourt. There was a point where B3 clearly in fc clearly batted it into the backcourt. Coach said A had to possess it in frontcourt before the count was up.

Who's right?