Without thinking you push open the door. You are confronted with a view of your naked mother apparently sitting on the bed watching you.
But it's not your Mum. It's your shapeshifted girlfriend. She see's you and has a look of alarm on her face. She motions with her hands that you should go. Then you notice she is bouncing up and down. Those legs protruding in front of her are not female. You notice she is actually kneeling. Then you notice a pair of male hands, no doubt your stepfather's, holding your apparent mother's hips.
Embarrassed, you close the door. But you remain behind the door listening. You hear you stepfathers voice 'Is something the matter? Am I hurting you?'
'No dear, it feels really nice' that was your mothers voice.
You don't know what to do. That's your girlfriend in there. But your stepfather who you get on well with thinks it is his wife. Clearly she did not want to be rescued. You stay there listening for another minute. That noise is the bed bouncing up and down. It is only when you hear your mother moaning in apparent ecstasy that you return to the lounge room.
About 5 minutes later your girlfriend comes out. She is still looking like you mother and is only clad in your mothers satin gown.
You confront her 'What were you doing in there?'
'Well I thought that was rather obvious. I've been keeping Graeme occupied. I gather you got rid of your mother?'
'Uh? Yeah? But what were you doing?'
'It's evidently called "The Tigress". Did you know your Mom and Graeme are attempting to do all the positions in the Kama Sutra? Now I just came out to see what you are after. Graeme isn't finished yet. What was so important that you had to interrupt us?'
'I...I .. I thought you needed rescuing'
'Well you certainly took your time about it. I took my lack of a rescuer as as an indication that I should keep playing along. By the way, I can certainly appreciate what your Mom sees in Graeme. He has quite an asset. This body is really flexible as well. It must be all the yoga your Mom does'
'Were you actually having sex with him?'
'Of course. He thinks I'm his wife'
'But you can't have sex with him. You're my girlfriend'
'Well if I remember correctly you have had sex with at least 4 different women today. Surely I'm allowed to play around as well?'
'But they were all you'
'Well you should learn to shapeshift I you don't like it'
'Anyway you have now created a problem. Graeme will have memories of sex which Mom won't have. What are we going to do about that?'