Other Older Sister?

" Walk towards that corner to the right and sit on the white couch and wait for me, I'll get you a cold drink ", Violet stated, then she walked towards the direction of the kitchen to my left. I slowly walk towards the living room and sat on the white colored couch. " This couch feels really comfortable ", I feel like all my fruits of labor are all staring to bloom, " My, My, What do we have here?", Someone grabbed both of my shoulders from behind and This voice is quite familiar to me, I turn around and a woman wearing a Black Silky Night dress is behind me!!. Who is she?!, Huh?, I don't remember Ains saying that she has an other older sister?, " My, My, your shoulders are hard as rock-", Then she got even closer and, " -Say, Do you Wanna have some fun with me?", She erotically whispered. " Sound Magic: Super sonic!", Violet suddenly appeared infront of her; as fast as lighting, Violet swing her right hand but-, " My, Violet, This is rude for our guest ". The woman wearing a black silky night dress, catched Violet's lighting speed punch without even looking at her direction. " You're always using your seductive appearance to lure any man you see, you succubus mom ", Violet said to her... mom?!.