Patralekha is definitely not a close relative of Harini. But if we consider any relationship between them it would only be through her husband Samrat Salunkhe.So what should Harini be calling Patralekha Aunty?
Samrat Salunkhe who is a Paternal Aunt's son for Virat Chavan unlike Mohit Chavan who is his father's brother's son. Mohit too will be a Mama to Harini just like Virat.
I think Samrat will become Phuphaji of Harini considering his relationship with the Chavan family and his wife Patralekha would be a bua to her but she cannot be Mami like Sai. Being Mohit's wife Karishma too will be a Mami of Harini.
Edit
It's finalized Patralekha will be Badi mami to Harini since she's the wife of her Bade mama Samrat Salunkhe. 😂😂