Flower girls - BDSM base. Trigger a bdsm scene between 2 NPCs ?

[Magus123456789]

I'm using Flower Girls SE and Flower Girls BDSM Base. Everything works fine and I'm able to trigger a bdsm scene between me and an NPC.

But I'm searching how I can trigger a bdsm scene between 2 NPCs. The Fornicate spells always triggers a consensual scene (or maybe I'm just in very bad luck after 50 tries ...).

Is there any mod or trick to trigger a Flower girls bdsm scene between 2 NPCs?

As a secondary question, is there any way to trigger a bdsm scene where my character is not the dom?