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The original was posted on /r/amitheasshole by /u/Maratahout on 2024-01-02 08:19:48+00:00.
I [18M] have been dating my boyfriend [M30] for three years and we've been living in the same house with his sister [F26] the whole time because my mom passed away and my dad is an alcoholic and my boyfriend was the only one who took care of me when I was 15.
My relationship with my boyfriend is good, but not when it comes to his sister. I have atopic skin and if I don't use special creams I get all covered in extremely painful eczema. All these creams, shampoos, shower gels, and vitamins prescribed to me by my doctor are quite expensive, and I don't have much money of my own. I'm studying for college entrance exams all day long, and I don't have much time to work.
My boyfriend's sister really likes one of my creams that I use. She doesn't have eczema or anything, but she says this cream makes her skin softer. She's even bought this cream for herself before. But after she ran out of her cream, she asked if she could use mine.
I knew she was having financial difficulties at the time, so of course I let her. Since I always try to use my creams sparingly because of their cost, I was a little embarrassed by how much of my cream she used each time, but I kept quiet so as not to seem petty and greedy to her. My cream did start running out twice as fast as usual though.
Some time had passed since then and she had money again. However, she continued to use my cream. At first, I gently asked her if she could at least use my cream in smaller amounts. She looked offended, but said yes. But it was just words and she continued to use too much of my cream. I had bought this cream in a big jar and I had hoped to use it for a long time, but now it was almost running out. At one point I couldn't stand it and told her to buy her own cream. She agreed with me again. But a few days later, I wanted to grab the cream from my shelf and saw that she had used it again. Then something exploded inside me, and I even barely remember myself that I found the price of this cream on the internet and demanded her to reimburse me.
She was offended so much that she even cried. I felt extremely guilty. My boyfriend also now resents me for being greedy with his sister. I feel indebted to him and even more ashamed.
English is not my first language, I apologize if I spelled anything wrong