Game.SetDebugFact("sq027_panam_relationship", 1)
Game.SetDebugFact("sq027_panam_lover", 1)
Game.SetDebugFact("sq027_panzer_sex", 1)
Game.SetDebugFact("panam_romanceable", 1)
I tried all these, conversation prior and sex scene didn't happen, but after the mission I could kiss Panam when we say goodbye, and getting texts from her just as when romanced with male V.