Dragon Age 2 Quest Reference: Act 1 - Companion Quests - Portrait of the Past
Requirements: Birthright, Prelude - Bethany
This short quest is triggered by finding The Portrait of Your Mother during the Birthright quest. This quest is really just ridiculously easy and short. All you need to do is give Bethany the portrait as a gift at Gamlen's house. No matter what you'll get a friendship boost for it.