Complex sentence: Fanny's arrival at Mansfield Park was less than welcoming, especially when Mrs. Norris treats her more like a servant than kin and when the separation from her family finally overwhelms her, Fanny begins to cry.
Split into simpler sentences: Fanny's arrival at Mansfield Park was less than welcoming especially when Mrs. Norris treats her more like a servant than kin. When the separation from her own family finally overwhelms her, Fanny begins to cry.