I legit couldn't figure out what happened at the end. Were they all dead? Was he dead and dreaming of being with them? Were they in a poly thing? Were they just cuddle buddies while healing?
The end was super unclear.
And as a personal opinion, your clarification bummed me out. Kinda getting tired of reading stories that start out looking monogamous but end up in polyamory. Feels like it happens in damn near every one. >=( Again, that's just my opinion, not a criticism.