During the Crusader era, after Andy and Quynh find Joe and Nicky, the four of them stop to recuperate for a week in a village nearby. A merchant sees Joe and Nicky and is jealous so while Joe and Andy and Quynh are out for the day, the merchant disguises himself as Joe and sneaks into their current residence to fuck Nicky before the other three get back

+At first Nicky thinks it's Joe and let's himself be taken to bed. They're fucking and Nicky is kinda in that sex haze so he doesn't register that it's not Joe until the other person starts getting rougher than Nicky knows Joe to be

++Just as Nicky realizes that it's not Joe, Andy, Quynh and Joe have arrived home- Nicky knocks something over that he knows will break so he knows the others will hear it and the imposter is getting too rough and too much and he has a really tight grip on him to keep Nicky from getting out fr under him

+++The imposter drags Nicky from the bed and uses Nicky as a shield when Joe runs to his and Nicky's room and Andy and Quynh went around the house so they could sneak into a window to get a drop on the imposter

Extra bonus if Nicky manages to barely cover himself up with the bedsheet when the imposter pulls him out of bed and he's just so humiliated and embarassed that he let a stranger fuck him because he thought it was Joe

Extra extra bonus Andy and Quynh terrify the imposter into submission/leaving them alone forever while Nicky rushes to Joe just desparately clutching the bedsheets around him and Joe comforts him but Nicky is berating himself because he should have known better and he should have known that it wasn't Joe from the start