Seniors are highly likely to have been divorced or widowed. Not many have lived so long without a permanent relationship that they have lost - unless they're married and cheating. Quite a few probably haven't had the time to grow past the aftermath of grief and loss. As a result you should expect some "white water" to navigate:
If you come out of that and enter a real face-to-face relationship do things get better? How? Does the leopard suddenly change its spots?
Expect your mail, papers, computers, phones, car floor, and on and on to be subject to explicit and surreptitious rifling for "evidence" of your inevitable wrongdoing. After all, you are in their life so you must be guilty. If you are still working, expect the workplace to be snooped as well. After all, you actually leave the house for hours on end! "Where were you? Who are these friends?"
Kathy Bates' character in "Misery" was not pure fiction, but instead a composite drawn from senior dating.