@Regina114 Not sure what suggestions you're looking for, but sounds fine, just make it clear in the listings that the bathroom is shared with another guest if you have one at the time, and you'll have to be on top of going in there and cleaning once or twice a day depending on whether the guests are clean and tidy or slobs. Otherwise it could llead to bad reviews if a clean guest found a dirty bathroom every time she went in to use it.
And a nice framed note on the bathroom wall such as "This is a shared bathroom- please be respectful and make sure you clean up after yourself as well as being reasonable about the length of time you use it, in case the other guest needs to get in.
Then make sure you leave cleaning cloths, sponges, or whatever guests would need to mop up water, toothpaste, etc.