I am extremely attracted to my girlfriend’s sister. I stay with her and her family and I interact with her on a daily basis. It’s not like a weird attraction because she’s older than me but younger than my girlfriend. I feel so bad because on the days I drop my girlfriend off at work, I just wanna crawl into her sister’s bed. I don’t dare even hinting at this attraction but I really feel like her sister feel similar and if I crawled into her bed, I don’t believe she would stop me. It really s**** especially when me and my girlfriend fight and she’s right there. She even takes my side in arguments sometimes. I hate feeling this way but I can’t control myself.