My stepmom complains of insomnia, so I'm planning to start serving her stronger coffee after supper.
Why would you give her caffeine, if she is having trouble sleeping?
I want her to suffer.
Serving her strong coffee knowing she can't sleep is wrong. You are torturing her at this point.
It's not hurting her that much. I just doubled it from when it was too mild. I don't even think she noticed the difference.
You are harming her and you need to stop. Sleep is important part of healthy, why don't you find ways to help her sleep.