Alone time is exactly what all us caregivers need no matter how much we love our loved one. There was a couple times I would just go to the beach and do my crossword puzzle...nothing fancy or special, but the relief I felt, knowing he was in good hands for a few hours is indescribable. And I found that with respite, it so very much enabled me to give myself self-care.
There has even been a couple times when I didn't leave the house and just let her take care of him so I could get much needed chores finished up without the interruptions (for a lack of a better word). I wish you all the best!!!