Desperate to pee, and with the bathroom door locked, Alisha is lucky to be wearing a diaper in this video.

Having struggled with accidents in the past, Alisha has taken to wearing a pull-on style diaper full time, instead of regular underwear.  In this scene, that turns out to be a good idea as she finds herself locked out of the bathroom and desperate to pee.  Eventually, she has an accident, but her diaper saves her jeans from getting wet.