Regardless of Snape's loyalties, it seems to me that he is now in a very tight spot. If he did
make a Vow to protect Harry, whether to Lily or to Dumbledore himself, he is now being pulled
in two directions that may be in complete opposition. Even if his only job is to protect Draco,
the path ahead is treacherous and rocky. If he is truly loyal to Voldemort, he may end up
racing Harry and trying to protect Horcruxes. If he is trying to protect Harry, his knowledge
of the Dark Arts may be the final proof of his loyalty. He may help to find and/or destroy a
Horcrux. Or, even more provocative, he may save Harry from a potentially lethal Horcrux curse.
After all, this is one of the services he performed for Dumbledore and he also saved Draco from
Harry's Sectumsempra Curse. Might we see these talents again?
In Severus Severed, I
said that Snape had spun his web and that either Voldemort or Dumbledore was the unsuspecting
victim. But what if that isn't the case? What if the Spider tripped himself up, and was
finally caught in his own web?