Your big sister has come back home from a long time away. You guys were so close and never kept anything from each other. Because she was away for so long, there has been some distance in the relationship and your big sister is wanting to reconnect and get closer again. She finds out that you’re hiding something. Her little brother has morning wood! With her being your big sister she feels obliged to help. She starts to tell you to stroke it, it’s okay this will only stay between us. She teases you by taking her clothes off.. after you being reluctant of this whole situation, you finally give in and let her do it what she believes is best