I was surprised to hear how serious the relationship was it sounded like she was lining him up as husband number two.
That's maybe what he wanted, but I don't think it's ever that simple, even when kinder people than Wendi are going through the aftermath of a divorce. It sounds to me like she was playing him. She may have wanted to parade a high-status, attractive boyfriend in front of DM, to compete with DM's having a new girlfriend, and maybe prove to herself that she was highly desirable and could enslave another man whenever she wanted.