@Nogoodimaginativename: Think he is the brother like figure that FMC had when she was young (the one who left the house in order to gain power and be able to stand tall).
Well, that's the least threatening but most annoying one out of the way.
What's next? I suppose a good start would be Iris "innocently" inquiring about the warehouse and seeing where that lead will go.
Ooo...or maybe contact the forger before them and arrange for an discernibly fake forgery, which she can then use to bring the rest of the family down.
I liked this one more, since you can really see the Mishalla starting to feel the "Oh shit" that's gonna be common for them from now on... Hehehehehe.....