Curious NSFW

This post will be a little TMI . I'm sorry in advance. I am trying to get advice. I have been able to "finish" in my sleep, since I was a teenager. I am currently engaged to an awesome man. I have had issues with the lack of sex and not being able to finish with him. My fiance and I are working on solving those frustrations.

Last night I had a sexual dream about an ex- partner. In that dream I finished with him. In the past my finishing dreams were with the partner I was currently with. This one was not. I was wondering if any other woman has had similar situations and might be able to give me their opinion on why this is happening.

Thank you in advance.