Here is your 6 step guide to getting Madame to waste their idol.
1) Be part of an alliance that doesn't include them, that you're planning to go to F5 with (5vanhoe). Also be part of an alliance that does include them (3 Musketeers), so try to steer your main alliance away from targeting them so you have options later on if you need them.
2) Create a group chat with the 2 people you really want to go home (The Duke, The Rich and The Royaldrobe, henceforth known as DRR), because you've been BSing them to try to make sure they don't target you and they pitched working together and now you can't really back out of having a group chat.
3) Leave for 3 hours while you're gaming, because you're lazy and don't want to talk, and then come back 30 minutes before phasing.
4) See that 5vanhoe is now targeting Madame instead.
5) See that in DRR the people you want to go home are saying they heard your name from someone in your 5 group.
6)
forget you're immune7) Panic because you think they might be swinging things onto you, and blow up your 5 person alliance by calling out the source of the leak to the others
8) Doubly blow up your 5 person alliance by telling Madame that they're in danger
9) Your entire alliance agrees to just go for the easy target instead (except the leaker who you don't talk to), so seems like everything's set
10)
Just thought I would check with you, do you think I should be worried here?
When I came back - yes - now, I think you're safe but I'm still not certain. A lot depends on whether Oracle is being truthful with me or not, my read would say they are but I'm not 100% after last time
I'm confident we have me, you, Margot, Royal. If you're confident in one more then we're good
11) ???
12) Profit (but also completely blow up your game and the person who wasted the idol *might* have been close enough to play it on you at some point anyway so literally none of this was worth it at all