In Hong Kong Horror, My Little Sister Is an Evil Cultivator

I'm in a Hong Kong horror story, and from the start I've inherited a fortune worth hundreds of billions. My younger brother is a corpse-transcending immortal, and my younger sister is an evil cultivator who possesses other people's bodies. I accidentally stepped on a rope while walking and got on the wrong side of Thailand's most powerful evil spirit, the Ghost Master. There's also some old bastard rowing a boat, trying to toss us into the water as sacrifices. What do I do now? Waiting for answers online. It's pretty urgent. “Ding! The Double Returns System has been bound.” “Eligible target detected: evil cultivator Jiang Xiaoyue.” My name is Jiang Xiaoyue. My greatest wish in life is to grab my brother and refine him on the spot. But can someone tell me why he's even stronger than I am? And why is he using all my moves?!