PS Vue with Chromecast Question

So we currently have a chromecast in the living room and one in the bedroom. I use the app on my phone to choose the channel and send it to the TV using the chromecast icon. My issue is that I want to be logged on in the living room to watch whatever while my wife watches something in the bedroom, but we noticed it won't allow her to long in on her phone while I am logged in on my phone. Any answer for how we can both be on and use the app in separate rooms on separate chromcasts? I read it's compatible on up to 5 devices, but I not sure that's related to what I'm trying.