She is happy to spend time with someone she has not seen for a long time and be in your house, she wants to go outside and explore, you don't feel able to be with a little girl in the street, and you say no, that she plays in the house or watch TV.
You go to the bathroom and go back to your room and you see her playing with your things and the lamp, you tell her not to touch your things, then she says she is bored and keep playing with more and more things from your room and the house messing up everything, when you grab her, she tells you that she is still bored that she wish could understand your body to see what you are doing here, or that you understand her and play with everything
The lamp that was still holding shines, suddenly you feel smaller, weaker body, you see yourself and you see that you are your cousin, you see near you and you see your body, with cat ears and tail too, equally surprised you suppose that Inside is your cousin.
Wow, now I'm you, I'm an adult, I'm in charge, I can play, wear dresses, nice clothes, have many dolls whenever I want.
You tell him not to dare, mentally you are still the eldest, besides the things he said are girls and is now in a boy's body.
She tells you that it will be fixed soon, and you take the lamp off, that you continue to grab, she wants both bodies to be very feminine and to act for what our bodies are like.
You see the lamp act again, your body grows hair and turns red, face and body become feminized, breasts grow on their chest, their waist thin, you see the lump in their crotch disappear, their clothes become a tight green dress; your cousin's body hair turns pink, you feel your thoughts change, suddenly what you want is to stop being still and start playing with whatever you find, your cousin joins the game, they both get bored. Some time you manage to control yourself and ask to return to normal, she tells you that she had already tried and that the lamp does not work.
So stay talking, she more mature, apologizes for what happened, you 2 think how to solve this problem, when hear the door knock, she opens and is your aunt, now mom.
She asks your cousin, who she is and where you are?, why she has cat ears and tails?, why her daughter has pink hair and the same tail and ears?; she is inventing some answers, finally your aunt says that it is time to leave, you grab the body of your cousin, you are not yet ready to live her life, although you are also curious to wear her dresses and play with her dolls at home ; all this confuse you and makes you have children's instincts and felines, making you blush.