That infamous line from Minthara that hints for a romance scene to trigger, one glaring problem with this is its not locked to just Act 2 or just Act 3, you can trigger and have it played in both acts so I highly doubt it will ever lead to anything in the future unless the devs decide to lock it in to either acts and have designed a love scene for that in specific, unless they have a system in place that lets you have an adaptive lovescene not be reliant to a specific tileset from a specific act.
All love scenes in the game are act bound, there is a reason we have the stone alcove in Act 1 and a bed in Act 2 campsite in the wilderness instance.