One Hour Photo (2002) - 4 questions

Question: The photo that Sy got off the market stall, (the old photo of a women) he said to Nina that, that was his mother, was it his mother, or did he just say that to make himself feel better, and if so, why would he lie about that?

Answer: It wasn't his mother. He was just trying to fit in and make himself feel better.

Question: At the very end of the movie, when Sy's camera ends up having only photos of "the little things" as opposed to the pictures of the other characters pretending to have sex, I interpreted it as Sy not having actually TAKEN pictures of the couple, but really taking pictures of the room itself, on purpose - so that the pictures wouldn't get out, but instead he would just be giving them what he feels they deserved. However, on a couple other websites I have found the ending interpreted as Sy having hidden or disposed of the film that he took the lewd photographs with. Are either of these considered to be "correct"?

Answer: Sy's a little unhinged, certainly, but he's not entirely "sick". He did what he did to punish the husband for betraying his family; there was no need for him to actually photograph what he forced them to do. He definitely did not dispose of any film, that would be too far removed from his character. Pictures of the couple never existed.

Question: Does the photo at the end with Sy and the family actually happen or is this just Sy imagining what life could have been like with them?

Answer: This is mentioned on the DVD commentary - it's deilberately open ended so one can interpret it as either it's Sy imagining what he wants to happen OR it's what really happened.

Question: How did Sy know that William and Maya had ordered room service in the first place?

Answer: It's an easy assumption to make. And who wouldn't open the door to room service?