My Mom (89) still LOVES to soak in the tub. She does try to help but it's hard for her. Our bath tub is set up the opposit from hers so she can't get out by herself. I can usually lift her under her arm pits but it is a struggle. I just don't want to deny her a bath once a week if she showers the rest of the time.
I would suggest continuing with the showers until you can find a safer alternative.
good luck