Sister In Law

I have been in love with my sister in law for a number of years and want to tell her but frightened to in case she does not feel the same towards me. I wank thinking about her every day and recently I have managed to get access to her used panties which I smell and lick off the stains she puts in them. The smell is driving me crazy and wanting her more than ever. I even wear them so my cock has touched where her pussy slit has been. I just wish I would pluck up the courage to tell her I love her so much