Despite the level of desperation Outil had and being on the brink of using the diaper for its intended purpose, she somehow was able to last the whole time and make it to the bathroom. Apart of it was due to her being an Earth pony so she has a very strong bladder and bowel unlike her Pegasi friends who would probably have solid themselves at the end. Another part, it was just luck. After going a long time without going to the bathroom, she was given permission to remove her diaper and use the place she really wanted to be, the bathroom and it’s toilet. She runs into the bathroom and slams onto the toilet. At once, both her bladder and bowels start to empty. She relaxes while relieving herself while being happy that she made it just in time.