In Curse Of Strahd, Tessa was examined and healed by Shakti of the Wildhunt, and informed Pack of the strangeness of Felix Zsoldos. After they took care of his Shadow Demon, she remained at the orphanage until her mother took her back, then sold her for more dream pastry to Bella Sunbane.
The girl was rescued by The Pack at Old Bonegrinder before the Night Hags there baked her into pastry, but found getting over her trauma difficult. This was not helped by later conversations with Shakti of the Wildhunt; while trying to help, the Shifter asked Tessa what flavour of pie she would be turned into, and caused her to cry relentlessly.