Alisha is trapped, needs to pee, and is only wearing a diaper in this video.
With her arms wrapped around an interior column and her wrists zip tied together Alisha is completely trapped. She is desperate to pee, but there is no escape. She is wearing an adult diaper. However, she is still frantically trying to avoid the shame of wetting herself.
We get to watch her frantic efforts to not pee. There is little she can do. Finally she has an accident. Though the diaper manages to do its job, she is still embarrassed.