When I go back to my parents' house, there is a niece who invites me to "Let's take a bath together" in the same way as before. However, the body was already attractive enough to encourage an erection. Another example is my niece who, despite being over 20 years old and able to drink alcohol, is unprotected and plays polo...a situation I would normally have let my instincts take. However, it's an uncle and niece relationship, and all the other relatives are in the living room. What would you do?