Merry fucking Christmas

Supposedly one of the side effects of suffering a stroke is the inability to control ones verbal functions. That's why a lot of elderly people who have suffered strokes will shout profanities for no apparent reason. They also lack the ability to recognize the inappropriateness of this verbal assault, this is why I believe that my poor, sweet, normally Southern lady, of a mother has suffered a stroke.
No, she is not shouting profanities, but her ability to control her speech seems to be on a downhill slide.
Example 1
Her sweet next door neighbor gave her a purse for Christmas. My mother did no like the purse.
"Billie, sweetie, that was so sweet of you, BUT I just don't think I would carry it, it's just not my style."
(to me)"Honey, I think I might have hurt her feelings, should I have not said that?"
Example 2
She somehow weasled out of me, the horrible daughter, that I, out of extreme guilt, was having flowers delivered to her on Friday, Dec 23.
"Sweetie, I'm going to Georgia for Christmas so I won't be all alone since you won't come home,(I work Christmas Eve, Christmas Day, and the day after) so I won't be able to enjoy the flowers so I think you should just cancel them."
"Mother, it's a plant. It won't die in one weekend."
"Well, if it's a poinsettia I don't want it, I really don't like them."
"It's not a poinsettia, Mother."
Does she have to be found mentally unstable by an actual physician to have her committed or can I just sign off for that myself?