After Helena leaves, Douglas goes back on the pull, bringing women back to the hotel room, even if he's sharing with Martin.
At first Martin hides in the lobby when this happens, then is too tired and just ignores the activities in the room, until it gets too difficult to ignore. Maybe he looks over and finds Douglas or Douglas's conquest contemplatively watching him instead of each other.
It progresses. Martin watches, then after a while, Martin wanks. After that, is invited to participate, after that finds he and Douglas spend more attention on each other than the women, who don't seem to mind at all.
After that, Douglas stops inviting women back to the hotel.
(Note: OP would prefer the women to be confident, enthusiastic, and fully pleased by the activities between Douglas and Martin. No jealousy or hate, please.)
TLDR: Douglas's random Het encounters lead to threesomes with Martin and OFC's, which lead to eventual D/M.
Douglas/ofcs -> D/ofcs/M -> D/M
At first Martin hides in the lobby when this happens, then is too tired and just ignores the activities in the room, until it gets too difficult to ignore. Maybe he looks over and finds Douglas or Douglas's conquest contemplatively watching him instead of each other.
It progresses. Martin watches, then after a while, Martin wanks. After that, is invited to participate, after that finds he and Douglas spend more attention on each other than the women, who don't seem to mind at all.
After that, Douglas stops inviting women back to the hotel.
(Note: OP would prefer the women to be confident, enthusiastic, and fully pleased by the activities between Douglas and Martin. No jealousy or hate, please.)
TLDR: Douglas's random Het encounters lead to threesomes with Martin and OFC's, which lead to eventual D/M.