Tatum is associated with different people, maybe the actor Channing Tatum? There's also a Christine, perhaps a public figure or a different person. Then "big sis" could be a nickname for a public figure, like a YouTuber or social media personality. The term "takes your virginity work" is confusing. It might be a typo or mistranslation. Maybe they meant something about someone's debut in the entertainment industry? Or perhaps it's a reference to a specific work or project that a big sister (in a metaphorical sense) is involved with.
