Is a mother who suffers from obsessive-compulsive disorder and takes a very long time to perform ghusl – to the extent that she misses more than one prayer – to be blamed, knowing that she is bedridden and tires those who serve her, and does not like anyone to approach her?

It is not permissible for a resident to combine two prayers except for a legitimate Shar’i excuse, and waswasa (whispering/obsessive thoughts) is not an excuse that permits it. Each prayer must be performed at its appointed time, and it is not obligatory to perform ghusl (ritual bath) daily without a legitimate Shar’i reason. You must advise your mother gently and kindly.