I intend to somehow obtain some LSD, slip it into her rum and coke, wait for it to take effect, then quickly contact the GP and have him bring another doctor with him, and have her committed. Due to her age, and fragile state, she will be booted into a home straightaway and I will be able to visit her every 3 months with toffees she can't chew and slippers that don't fit, and send my brother to steal her ornaments.
I told her this in Tescos, and she said she wasn't giving me a lift home if that was the case!