IENF-088 The night when my brother's beautiful wife, who is indifferent to me, let me cum inside her just once.

I'm incredibly excited about my brother's wife, who is way too beautiful. Even though I know it's wrong, every night I peek at her changing clothes and use her as material for my endless masturbation. She clearly knows that she's being used as masturbation material by me, but she couldn't care less. At my breaking point, one day I mustered up the courage to ask her! "Just once is fine! Please let me do it! It's a request for my entire life!"