Responses
I don't think so, it's just the author skipped the scene described by the maid (where the prince bring Estella home & the Countess removed her bloodied clothes without realizing the prince was still in the room), so we don't know whether the prince saw anything or not. But, his behavior makes me think he know... I went back to the previous chapter to check if I missed an update xD

So the prince now know Estella is really a girl?