My sister gave birth to a daughter, how can I make a circle of friends?

You can send a photo of her daughter with a sentence: "I really hope this child is mine."

Aunt is a kind of kinship, and aunt refers to mother and sister. "Menstruation" is used to address the mother's elder and elder. A period usually refers to the mother's sister. Nowadays, menstruation has become synonymous with menstruation. Menstruation period was originally a kind of respect for elders, but now it has become another way of saying menstruation. The younger generation of women prefer to use this word instead of menstruation, so now menstruation has become synonymous.