Adrien tries not to look directly at Val's nipples.
Val's body language has been steadily relaxing throughout the whole story, but now that Adrien is aware of his secret, Val has been getting really loose. Previously, there have been a couple moments where Val forgot himself and then quickly had to stiffen up in his fear to reveal too much of himself. Now, with the secret off his shoulders, he can be at complete ease with Adrien. This is who he really is.