Continuity mistake: When Xerxes and Memucan return on horseback, Memucan's horse has a bridle with a plain leather headband and noseband, but when they stop near the old lovers gate, Memucan's horse is now wearing a bridle with a silver studded noseband and headband. (01:11:00)
Continuity mistake: Xerxes cuts his hand badly when he grabs the sword about to be brought down on Esther. He uses the same hand to touch Esther seconds later with no blood dropping or around in sight. (01:44:30)
Continuity mistake: During Esther's banquet when she is pleading her petition, Xerxes has a dagger tucked into the front of his golden belt, but while Esther is holding the necklace in her hand, in two shots facing Xerxes the dagger is gone, and then it returns. (01:49:50)
Continuity mistake: When Esther is confronting the King Xerxes and Haman at dinner, her necklace disappears and then it reappears on her neck.
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.