With end-stage liver disease often comes esophageal varices. It's a terrible event to witness and a real possibility. I witnessed my father die this way and still struggle with the memory. My daughter witnessed it, too. Perhaps before you make a decision to take care of him during his last days, it would be helpful to conduct online research on end-stage liver disease so you'd know what may be in store for you and your children if you choose to go this route.
I was not prepared for what I witnessed and it still haunts me to this day. So, when it became clear that my boyfriend was in the end stages of alcoholism I was determined not to let my daughter or myself go through that again. It's not wrong or selfish to protect yourself and your children from harm.