Currently, I'm working on a few pieces for a romantic (I use the term lightly, of course) fanfiction challenge I'm participating in, and one of the requests I received has to do with two specific characters getting kidnapped. In canon, there was only one situation where this happened as far as I can recall, and during that time both characters were rather brutally tortured.
At first, I thought executing this concept would be next to impossible, because I would have to have them in some kind of romantic and/or sexual situation while this was all taking place. However, when I was discussing it with a friend, she mentioned to me that back when POW prisons and camps were unisex, it was common practice for prisoners to have sex even after they'd been tortured. Being me, I was skeptical of this, and ran a Google search for things such as "prisoners of war + sexual activity", "POWs + sexual activity", and then simply, "torture victims + sex". Naturally, I came up with very little besides mentions of sex used as a form of torture.
As for the characters, both are highly-trained secret police that are familiar with combat and pain. The oldest of the two was actually impaled with a sword earlier on in the canon storyline, and though he had a long recovery period (and did not reappear for quite a while, leading most fans to believe that he was dead), he eventually did get back on his feet. In addition, after their abduction and subsequent torture, both characters were able to recuperate in a very short amount of time. Thus, it's safe to say that they will probably handle pain better than some random person off the street. However, that doesn't mean that they'll be able to handle brutal beatings and immense amounts of physical torment without breaking a sweat.
So, my question is this: is it possible that these two characters could be having either sexual or romantic relationship throughout the duration of their abduction? What about after they escape? Would it even be on their minds at either time? Help with this would be greatly appreciated.
ETA: Thanks for the responses, everyone. They're all exactly what I needed. Thank you so much!