Call

[tcblue13]

Speaking Fed
The BR is out
8-6-5
A runner is out when anyone other than another runner physically assists the runner while the ball is in play

Granted, this does not refer to a BR but other rules in 8-6 are applied to BR's so I would apply this one as well

To answer Dakota's question, If the other 2 runners were the ones assisting I suppose she is safe. That scenario seems so TW though.

I sort of pictured that exception to mean a trailing runner can help someone to her feet or push her to the next base in the event of a fall or a lapse in running.