User blog comment:Omega natsu2/Fairy Tail Episode 212: Juvia vs. Aries: Clash in the Desert!, Review./@comment-24729244-20141213065118/@comment-7418318-20141214083637

It probably is, but consider the implications and Lucy's history here:
 * When Gajeel put her through real torture, she was provoking him instead of begging for release.
 * When Loke was about to die, she was risking her very life to save him, despite barely knowing him.
 * On Tenrou she was risking a very painful death rather than leave Natsu alone and run away.
 * In this very arc she begged Natsu to not interfere and leave the matter to her, even though Virgo was causing her a lot of physical pain at that moment.

As you can see she's faced actual torture and threats to her life aplenty and she stayed and fought. And now this stalward soul is running from something entirely harmless and merely gross?

There's also the matter of what might be happening right now. For all Lucy knows, Loke could be finishing the ritual that'll kill the Zodiacs and yet she's just running around playing for time? In-story this delay could be the difference between them being able to save the Spirits or watch them die. We outside the story know that won't happen, but LUcy couldn't know that.