Is it weird that I found a small hall of hair of my boyfriend sister in his bed?

She has purple hair so is hers. I just found it a bit odd. Has that happen to you?
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I know it sounds crazy and I don’t want think the worst but I don't know how the conversation started that my boyfriend said his sister very effectionate person and hugs him I said that weird usually siblings don’t like that. She’s 21 my boyfriend 30. He also made a weird comment saying that he tells his sister “ to move them away” her big boobs. Just yesterday my boyfriend said that when they were in the car his sister put this song called “ deepthroat “
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we heard it bc he said it was the nastiest song he heard. I said that what you heard with your sis and she said. She put it on. I don't know I guess I’m it just makes me feel a bit awkward uncomfortable and now with finding a ball of hair a bit more.
Is it weird that I found a small hall of hair of my boyfriend sister in his bed?
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