Question for Cooks

My mom has a question to ask you about cooking. On Thanksgiving Day, my parents and visitors ate turkey. My mom had cut the turkey for the visitors and then saved the bones to make a broth later. For the broth, all she added was the turkey bones and filled the pot up with water and boiled it. She did not purposely add in any of the turkey sauce or drippings. After refrigerating it, she skimmed off the fat. Well, under the fat, the broth was really thick. It was like gelatin or jello. This was the first time her broth turned to gelatin. It is still okay to drink and use, right?