Yes, but the odds are against it and with swaying, it affects your internal environment in such a way that sperm tend to survive a much shorter time. So it is likely that most if not all of the earlier batch will be gone by the time that the new batch arrives, and IF they aren't, since the new batch will take time to capacitate after ejaculation (and cannot fertilize any egg that shows up anyway) the first batch will go on to fertilize the egg while the new batch is still sleeping.
We are getting great results with it - ALWAYS go with success instead of "theorizing" because all of us who make up the theories have no idea about what will even work.

