SVS offers 15 and 20 foot connect cables if there is some way to run the wires. But that means not being able to move them much. Seems what you're looking for would be an app based wireless setup like Sonos or Apple home pods. Neither of which can connect a CD player (AFAIK). Maybe you can get your mom to use an ipad or iphone and just stream everything.Lots to unpack there. I have started sifting though it.
Thought there was a contender. One active and one passive, though. This may be the biggest one to overcome, at the speakers will likely be at opposite corners of the room.
I really appreciate all of the suggestions!