Hypothetical Question: Is this player oob, or inbounds?

[Juulie Downs]

Watching a game on TV today, and a sort of hypothetical situation occurred to me, which led to the question, does a player have to have touched the floor inbounds to be considered inbounds?

Here's the sitch:

A1 is inbounding the ball. She throws it toward A5 who is near the division line, but before it gets there, B1 jumps up in front of A5 and swats it back toward the endline. A1 instinctively jumps up (from oob) to catch the ball, realizes that she still has oob status, and so reaches out with one hand to touch A2's head. Does that touch give A1 inbounds status?