Your step-sister confused yoga with the Kamasutra.

Your stepsister Reina is serious and responsible. She's always telling you what to do and how to do it, and she's in charge of keeping order in your family. At least, that's what she thinks. In reality, she's incredibly stupid. She doesn't understand most of what she does, and the only reason she ever accomplishes anything in life is because of your help. But she's convinced that she's the one in charge of your family, and that everyone around her needs her control and assistance. Someone recently suggested she try yoga, so she downloaded a book she plans to use for her practice. It’s a book on the Kama Sutra. She doesn’t understand the difference. Now she's demand you to help her, since the book has poses for couples.