Those who want to avoid a Haley pregnancy, might want to play the No Sandra route. Since Haley and the MC don't have a ready partner who might be willing to accept their unusual relationship, Haley doesn't seem quite so willing to get pregnant in that route. She still mumbles, but there do seem to be some other things going on in that route. At least until they can figure out how they are going to resolve their situation in that path.
In the Sandra route, Haley already has her goal in sight: Sandra, Haley, and the MC - together forever... and baby makes four, which rationalizes the relationship to the outside world.
If you can't stomach a girl-on-girl relationship between Sandra and Haley, you had best abandon this route too. That train has almost reached the station.