
Revealing mistake: After the scene with the apothecary where the two eunuchs purchased the belladonna it then cuts to Esther, and in her closeup as she lifts the silver cup to drink, there's a small white modern sticker on the underside of the cup. (01:02:00)
Answer: No, Xerxes does not kiss her forehead because you see shortly after that, she is still asleep then wakes up. If he had really kissed her she would have felt it and woken up right then.