Hi, this is long, but for a reason. I hope you pass it on to those in your situation on youth forums. I've had ms for almost 20 years and am trained in research. The last thing I would contemplate is contracting ms from a parent. It's just not that kind of thing really. What I have read that makes sense is that there can be a "disposition" toward the disease in rare cases. That's all we need to speculate on.
Remember that this is a central nervous system problem. Children of such parents may become unusually sensitive and empathetic. There can be a special intimacy and inner connection which is great however. My daughters started growing up with it from age 5 and 8, if I recall. Now they are 24 and 27. The latter had viral meningitis at 16 and still suffers headaches and fatigue. No connection whatsoever. She, also had weird moments at about 12, with temporary blindness, and what would a father with full blown ms ask her doctor first? And what would the answer be? Fogiddabodit. And that is exactly what I counsel you to do in general. It was hysteria from hidden stress. So, she has indeed had a disposition for some cns problems: like others may be vulnerable to depression.
You cannot help a paren by psychologically identifying wit the ms. Suppose a nurse or physio did that? It is her wrap, the cards dealt her body and not yours. So, in addition to being a caring daughter be independent and very active outside.
Along the line, you may experience some form of cns effect. Everybody does! However, ms is a very specific disease condition and very singular. No 2 cases alike because lesions can randomly appear and disappear (as they are realizing) anywhere. There is no proof of a cause, and a lot of people - like myself - had viral flus prior to the initial attack. Also, a very learned professor of neurology told me that there is no real proof that ms is even what they call an "auto-immune disease". Medicine is often more an art than a science.
Do avoid or treat any form of depression. Some youth think it is actually cool to be sad. Listen to dido's "see you when you're 40". They're nuts to host sadness because the mind is more powerful than the body. It can create conditions for many diseases that normally would never have surfaced. I purposely have kept my girls out of the ms loop, so-to-speak, and turned it into something kidna fun - eccentric. By not calling on them for company or help during rough times, which wasn't easy, they did not get too involved, obligated. I have seen how it has warn down my wife partially because it is like having the flu 24/7. Although that's my trip it has to have an affect on her over so many years, and she's not my child.
Perhaps pretend to be a pro nurse if you are caring for her. You should not be feeling her pain because this engages your cns sympathetically. If you put two toes of separate people in touch for a matter of months they will grow together. Love, affection, detachment. Anyway, I personally prefer professionals around me when things are heavy because they have studied it and are more proficient. My youngest is ultra sympa at heart, but I do not let her get attached. She's a student at the amsterdam school of theatre and trained in acrobatics and dance. Her big thing is that she can pick me up like i'm a pet dog and twirl me about with ease.