Ankle biting help

Hi people, i got a 3 almost 4 months puppy, and she gots that habits of biting my ankles when I turn my back, im getting so tired of it cause I need to have my guards up all the time, doesn’t help that the lady we got her from was letting all the pups bite her and bark at her constantly so now we have a shark puppy to educate, any tips to make her stop ?

(Ps : for some reason she never does it when the family is out and its only me and her, she is actually very calm)