Over My Dead Body

"Hawke is convinced there’s a thing going between Anders and his younger sibling, and is fucking pissed off. The possessed apostate and his little sister? Over his dead body! Anders needs to be stopped before too much damage is done to little Hawke! But easier said than done, they keep talking. And flirting. And doing… things (or is it just Hawke’s imagination?). As different ideas on how to end it fail, Isabela suggests that Hawke must seduce Anders himself."

As prompted on k!meme, with a specific request for a BAMF Hawke who was utterly inept at seduction, having usually had sexual partners throwing themselves at them.