sister-in-law asks for massage but with double intentions... I just wanted to fuck

I really want to fuck but in the house there is only my brother-in-law and I can't tell him directly to tell me since I am an innocent girl so I tell him that I need a massage to relieve the pain but the desire is stronger and dominates me. I thought it wouldn't happen, but I realized that he also brought me desire and we both ended up involved in a scene of passion, sex and pleasure. From that moment on we fuck every day. What would you do if you had a sister-in-law like me?