I point to the conversation Haley and the MC have in the forest, and the final sex scene where pregnancy is virtually impossible. In that forest scene, Haley hasn't figured out how they are going to maintain their relationship. I doubt that she would really want to become pregnant, before they figure out how they will be able to continue together without public condemnation.
While the MC still cums inside Haley in other scenes and, as I noted above, she still mumbles, consider that the developers are constrained by time and can't come up with different scenes all the time for each path. The first half of the first day in this latest release is identical, irrespective of your path, including the sex scene. There is no separate pathway in the script until the point where Sandra is supposed to return. The developers left it that way, I presume, because of time constraints. That and the mumbling is actually funny enough to leave in, if troubling (or hopeful) to some.