The largest scarifice is in your personal life. Not many other people (women) want to enter into this kind of situation
The same goes for men as well. I think it can be summed up under no good deed goes unpunished. It is other's right not to get into this kind of situation but very few stop to think about the fact if this person is that devoted to family that they are the ones who are not going to walk out when times get tough.
Kudos to you for what you are doing. I know it is tough looking after family members on a 24/7 basis.