I think that this one scene exemplifies the tremendous skill that Richard possesses. In a very short time he turns this young woman's scornful attacks of hatred and her hot tears for her dead father and husband into a sincere lust/ desire for him. He blatantly states that he wants to be in her bed in line 112 and in the lines following describes how her beauty haunts him in his sleep (line 122) and that she is both his day and his life (line 131-132). She retorts these lines with anger, such as wanting to kill him in order "to be revenged on thee" line 133. Yet, by the end of the scene she wishes she "knew thy heart" (line 180), accepts the ring that he gives her, and rushes off to his home, leaving her poor loved one's funeral procession!
This complete 180 that Lady Ann undergoes in such a short time is questionable because in reality most people would not just run into bed with the person that murdered two family members unless maybe she had been wanting him while they were alive. I don't think that this is the case with Lady Ann, but Richard seems to have had his eye on her for a long time so he might have been planting this seed of lust long before he killed her father and husband. This is just the beginning of what Richard has in store for the characters of this play and I think that there is going to be many more incidences of his cunning and deception the deeper we get into this play.