So what's the call here?

[Al]

Here's the play...Girl trying to turn an easy triple into a home run. The throw from the cut off was about 9 or 10 feet up the third base line. The catcher charges up the line and catches the ball on the fly just as the runner is passing her. She attempted a swipe tag but missed. At the time of that attempted tag the runner went to the outside edge of the base line. (her left foot was right on the 3 foot line as she passed the fielders missed tag) But the momentum from her sudden change of direction, as she tried to avoid the tag drew her way outside the 3 foot base line. She even lost her footing as she was closing in on home plate. The catcher was closing in on her, but was a few inches short of tagging the runner who scrambled on her hands and knees to the plate. I got some noise on this one!!! It was a pool game and I made the call against an out of state team. Their coach quickly yelled out my call was the "worst call he ever seen"! So what's the call?