Lyn's requested that her bath tub be converted to a walk-in shower. She's explained that she would feel safer not having to step over the sides. It makes sense.
Tub to shower conversions are pretty common.
The idea has been floated before as something that may need to be done for her. It would be easier for her to walk-in and shower than for her to bathe sitting down. If she wanted to sit, the shower could have a built in bench at one end or a separate shower chair could be made available.
We'll have to start looking into it, I think.