I find this a bit ironic. Since Alana never really got a "path", if you play around with her as much as you're allowed, you end up not seeing her again after a while. Presumably the MC and/or Haley might pass her from time to time, but there's nothing more in the game that players will ever see (and so, of course, nothing sexual).
However, if you're on the Lisa+Haley path, Alana shows up again briefly before the end (of course, not sexual either). I wonder if it would be worth it to pursue both Alana and Lisa throughout the game, as in wondering if there are any minor dialogue differences or anything. There probably aren't any changes, and it's almost certainly not worth it, though.