Can my boyfriend be attracted to his ''cousin''?

Anonymous
Well me and my boyfriend have been together for about 2 years and I just met his cousin she is pretty and has a nice body at first she seemed like a nice type of girl but when I started getting to know her more she seemed kind of whorish.. my boyfriend tries flirting with her by putting on a mask to scare her and stuff.. I've never been so jealous this one time when she was going out to a party she asked him if the dress looked sexy. my boyfriend just smiles and nods no... I have a really bad feeling about her.. I don't seem to like how she is around him he acts pretty weird when she's around also... any tips etc I really don't want to be all jealous over his cousin.
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+1 y
& He has picture of her on his phone
Can my boyfriend be attracted to his ''cousin''?
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