Zhao Yunlan has this whole episode been hinting that he knows the truth and just wants Shen Wei to say it. Then Shen Wei inevitably lies and Zhao Yunlan facepalms/in general makes some truly amazing expressions, then seizes the next opportunity to put him on the spot.
Can't lie, I would've watched an entire episode of just that conversation. God I love the face acting from both of them.

Also I know I've said it before (and I will say it again) I love your writing style for these entries. The slight snark amidst overarching love is perfection.