Robyn was not raped

The tape cut off with the masked Gordo waving to the camera, the implication being that she was perhaps about to be raped. Noting for the police to go off of, even it it went that far.

Having said that, I don't believe that he raped her either. He was merely torturing Simon with the possibility that he had been able to take everything from him the way they Simon had done to him. Gordo was not a psychopath. He was just a very damaged person who was pulling out all the stops in order to get revenge. In the time it would take for a DNA test to come back, Simon would be going crazy and Robyn would hate him all the more for putting her through it (especially since she believed that Simon had attacked Gordo, reinforcing her idea of him as a ruthless bully.)

This film defied expectations in the best possible way--the "villain" was entirely in the right, and was never shown to be someone who would hurt an innocent person just to further his plan. Sure he poisoned the fish (that were actually his, since he'd gifted them), he kidnapped the dog and drugged the wife, but he explicitly refrained from harming anyone. His ultimate goal was to hurt Simon by showing everyone what a bastard he was.

"Beethoven had his critics too, Keith. See if you can name three of'em."

I don't belive he raped her either but there's a possibility he did only because I believe Simon was infertile and that's why they never had kids. It wasn't really brought up in the movie but it was kind of hinted when Gordo is talking to Simon and Robyn at the dinner table about their great life but when he comes to having a family they're silent. In the beginning of the movie I thought Robyn was infertile but towards the end I believe Simon was and I think Gordo knew that and used it to his advantage. I think when Robyn said she was pregnant Simon was surprised because they finally were going to have a baby not realizing he might not of been the one who hot her pregnant.

I instantly believed she wasn't raped. He just wanted Simon to be unsure. The whole theme of the movie is how lies can go too far and that is what Gordo is trying to show him.

I don't believe Gordon raped her. I think he just put the thought in Simon's head just like Simon put the thought in everyone's head that Gordon was gay. Gordon told Simon he would be able to tell by the baby's eyes but the baby had his mom's eyes so..

Interesting perspective, but ultimately you're filling a lot of blanks with assumptions, and arriving at conclusions that essentially miss the point of the ending. The simple answer to the ending is we don't know, just like Simon doesn't know. That really is the long and the short of it.

My suspicion is that Gordo was sexually dysfunctional and so he couldn't rape her even if he wanted to. But he could create the props necessary to make Simon lose it, so good enough.

I think it would have been really funny, super funny, if after the final end credit rolled, they show a little more of monkey man... and he tells the camera that he didn't rape Robyn, he couldn't, because he prefers men... and the camera pans over to a drugged, sleeping Simon (in very colorful, distinctive boxers/briefs), then back over to monkey man, who nods and starts assaulting sleeping Simon. This could even go along with some little hints left earlier in the film, like have Simon began one morning scene with 'why is my ass sore?' wearing those same boxers. Maybe he could spend half the movie trying to figure out why there's blood in his poop.

Of course she was raped. That's the whole point of the movie. That's what the title refers to. From the very beginning, Gordo talks about how good things can come from bad things. The baby is the good thing to come from the bad thing-the rape. The baby is the gift. As for DNA, all that would show is they had sex. He was careful to wear a mask in the video and did not record the attack. She was friendly to him and fond of him and expressed those feelings in front of others. He came over frequently. And, she had a history of pill popping and passing out. Would be his word against hers as to whether it was consensual. The reason Simon doesn't call the cops is because it would completely devastate his wife to know her new baby, which she loves and has wanted for for so long, was not her husband's and the product of rape. Second, it would obliterate any chance he had of staying with her. He may still have a chance at getting her back as things were left, but if she knew what really happened and that Simon's actions led to her being assaulted, he'd never hear from her again, obviously. And, for Gordo, just teasing Simon about a rape wouldn't be much of a lesson, would it? No, Gordo wanted revenge and just mind effing him would not be nearly enough to satisfy him after Simon's actions had so completely destroyed his life. Simon wouldn't be sobbing at the nursery if he believed the child was his. He was sobbing because he knew that it wasn't.