It appeared to me that she felt that the only reason to see a bond between them being important to the choice to have sex was that the reader was coming at the story from an OTP perspective, which isn't true. That interpretation, at least in my case, is about believable human responses, not about clinging to common slash tropes. Her using the word 'error' and repeatedly refuting any other reading than 'situation only' made it seem to me that she was unable to acknowledge the importance of any sort of emotional bond in this instance. So, we're probably all in agreement that it's both situation and bond that leads to the behavior, but not that it's an OTP reading that makes the bond important to the action.