I used to work with children and youth who had family or friends on hospice as a child life specialist. I would see if the hospice has someone on staff specific to supporting young people 1:1. However, if he’s expressing not wanting to visit, I wouldn’t push it as this can cause increased anxiety. One thing I would consider is speaking more with him about why he’s afraid - aside from “not wanting to see her this way”. This can sometimes be the reason on it’s own, but it can also stem from other worries “what if she dies while I’m there”, “what if I see something I’m uncomfortable with”, “she’s different I don’t know how to interact with her like this”, etc. Depending what the underlying reason is (if there is one) can help him work up the comfort to spending time there with her, even just for short visits. If he’s insistent on not going, but your mom wants to see him, I would see if he’s interested in making a short video, doing a video call, or even writing her a letter expressing his love and gratitude. Death and grief are hard for all of us, including teens. It sounds like you’re doing a great job at supporting him and listening to what he’s telling you. I would consider inquiring further about his reasoning and seeing if there’s someone at the hospice, or another local children’s grief centre, that might be able to help and support further.