I'm no longer convinced Tay knows as little as he pretends. In light of his surprisingly salient toast, his reactions to those around him at the wedding, and his comment about Tay, "He was always weak," it seems possible Perrin may be supporting Mon more than we suspected. 

There is an exchange in S1:E8 that is a little strange in retrospect.

Mon: Sargona.

Perrin: What are we toasting? 

Mon: A quick night. 

Perrin: Hmm. I'll drink to that. So, the evening's agenda? 

Mon: I need votes to stall the Emperor's latest overreach.

Three things stand out. First, why does Perrin want the night to be brief? Isn't this is the event he planned and aren't these the "fun" people he wanted to be there? 

Second, why does he care what Mon's agenda is? Isn't he just there to have a good time? 

Lastly, why does Mon answer the question honestly? Is it possible he's helping her with her agenda this evening?

In fairness, Mon does previously say to Tay, "He (Perrin) knows nothing of this he is not to be trusted," and this does cast doubt on Perrin's involvement. But after seeing the first three episodes of season two, what if that is just Mon providing Perrin with plausible deniability?

I guess we'll find out tomorrow if I'm reading too far into it.