Orin and Astarion are fictional. As well as Druid Bear and Astarion.
But here the player sort of steps into their character's shoes and "creates their own story" as BG3 stated, and now everyone is forced to step into the victim of the abuse.
You could say it's fictional, true, but it's already directed at the player's emotions and doesn't even fit the story - the kiss chooses Tav and may not choose - tadpole, breakup.