My boyfriend called my sister hot?

So I sent my boyfriend a pic of me and my sis cause I thought if was a cute pic and he goes “y’all are so hot” and I laughed it off I mean that itself isn’t so weird. But then he goes “I wanna f*ck u guys together so badly” and “I’ve fantasized about u two before” and other stuff that made me super uncomfortable. When I told him that’s weird he ignores me and keeps going. Am I wrong for getting weirded out by this? & do you think he’s being disrespectful to me?
My boyfriend called my sister hot?
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