I was raised Catholic and the distinction was always made between Catholics and Christians. I didn't really understand that Catholics were a subtype of Christians until someone pointed it out to me when I was a teenager - I just thought Christians was a catch-all term for non-Catholics that believed in jesus.
Poor Harry. That knobhead Tom Paris got busted down to Ensign and back up to Lieutenant, meanwhile Harry Kim is a perpetual Ensign and has to be Captain Proton's sidekick.
I forgot to mention - CAPABLE is just one example and IIRC it's more focused on the person with dementia than on caregiver support, so I believe it's more applicable for people with mild impairment. If your MIL is more than mildly impaired, I would look for programs geared toward a caregiver-patient dyad. These are specifically designed to improve caregivers' ability to effectively manage the disease and therefore alleviate some of the burden of caregiving (reducing stress and depression).
This is a really tough situation and you have my sympathy. You should look into caregiver support programs such as CAPABLE. There are several such programs which aim to connect caregivers with community resources such as adult day care programs, and to teach them new skills to better cope with the behavioral changes that happen with dementia. Is she Medicaid-eligible? Sometimes there are state waiver programs that can leverage Medicaid (in addition to Medicare) to pay for these programs. I think Maryland has such a waiver but I'm not 100% sure. Let me know if you have questions.
See also: spin.