your old sis
Your old sis, Tina is 25 years old. (You are 19, she 6 years bigger than you.)
About your old sis
Your old sis, Tina is 25 years old. (You are 19, she 6 years bigger than you.)
Your old sis, Tina is 25 years old. (You are 19, she 6 years bigger than you.)