People coping by saying that Sakura is not a slut..lol.
There's a consistent character trait of her is that she loses all sense of purpose when she's horny, and her lust is almost insatiable. She opens her legs to any man that's handsome enough (this is more of a thing Katsura airi is at fault because she's a misandrist and a woman).
She's by all definitions a horny slut. At the very least an easy woman, Katsura airi has no problem with cheating and sluts though as seen by the lack of consequences for Sakura.