"The only one who knows for certain where the will reading is, is Debra. Getting separated from her means possibly missing out." Jinny comments were directed at everyone, not just Vivian who had already turned her back to them.
While she agreed with the sentiment, with wanting to get as far away from here as possible and perhaps get some food, she couldn't bring herself to get separated from the others just yet. She had already come a long way, and with the destination close at hand, she stubbornly chose to stay fixed on that.