HBP question

[CLBuffalo]

During a tournament yesterday I had the following situation.

Batter squares to bunt, bat is over the plate. Pitched ball hits batter in the stomach, no chance for her to get out of the way. The bat never moved forward. I awarded her first base. The defensive coach said that since the batter never pulled the bat back it should be a strike. I replied that that was only true in college ball. I do wonder though if it would indeed have been a strike in college ball and not an HBP. I've never had it happen in college games I've done and have never seen it games I've watched.