I think it is the spirit of his mother coming to reassure him that everything is ok. The touching of the foot to comfort him is a sign that she knew he was there during her coma. I think that these events will pass as soon as your mum's boyfriend begins to overcome the grieving and starts to move on.
Then the spirit will be able to leave. Don't worry there is no evidence of a spirit ever hurting anybody. And paranormal activity was just a movie.
If I was a spiritual person, which I am not, I would think it was his mother just looking over him. My explanation to this would be that he was just experiencing some sort of unconscious sensation as the result of a dream. As for the light, I have no idea.
Someone did probably turn it on while not realizing it in the middle of the night, and being half asleep, just didn't remember it. If you want to be romantic and believe that it was a ghost, then be my guest. Personally, I just think ghosts are the results of overactive imaginations.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.