Lesbien Tomber

Kevin and Fanny are getting married! Well, actually, entering into a civil partnership… Because according to Fanny, marriage is expensive, it's too much work, and above all, it's too hard to get out of it! And for good reason, she knows something about that: Fanny is already married, to someone named Camille, about whom Kevin knows very little, and especially not that she's a woman!
So, when Camille, the not-quite-ex-wife, a temperamental and completely unbearable lawyer, invites herself into the couple's apartment and meets Kevin, about whom she also knows nothing, the encounter promises to be explosive.
Fanny will have to explain herself to both of them, while trying to prevent them from killing each other.
Because Camille only wants one thing, and she is ready to do anything to achieve it: prevent this civil partnership and get her ex back.
Will she succeed?
Will one of the three die?
Or will Camille, the lesbian, ultimately fall for it?