Claire/Your Mom makes some lunch while you two have sex.

"Sweetie, why don't you both go ahead and start without me while I go to the kitchen and make a lunch for all us?" Claire or rather your 'mom' asks you and your 'sister'.

"Sure thing, mom." you both answers as Claire/your 'mom' walks to the kitchen and ready to make some lunch. And then your transformed girlfriend/sister hugs you from behind as she smiles at you and says:"Now that's our 'mom' in the kitchen. Let's say like, we enjoy to please each other, shall we?"

"Whatever you say, 'sis'." you reply as you both kiss and make out with each other. During the kiss, you dry-hump to your 'sister' as you both feel the pleasure between brother-sister loving.

"Wow, 'bro'. You're like, such a good kisser. I just hope you, like, enjoy your 'sister' make love with you." your shapeshifting girlfriend/sister responds as she told you to lay back so she's give you a blowjob. As your 'sister'(formerly your girlfriend) starts licking your big, hard cock, she then take a deep throats all in her mouth as you're moaning and feel the pleasure. After that, she suddenly stops sucking it, then you look down and she's trying to give you a boobjob. "I know that these boobies like, in C cups. But I'm like, want them to get bigger like our 'mom'." your shapeshifting girlfriend/sister smiles as you see her breasts are expanding into double size of EE cups. "I like, hope you like big boobs, bro."

With that, your girlfriend/sister is thrusting her boobs faster as you're almost cum. Finally, you couldn't hold any longer, but just cums and release all of your seeds and shoot all over her boobs and face. You sat on the sofa as you're enjoying your girlfriend/sister please you, and you look down to your girlfriend/sister cleans herself and taste your semen. "Mmm, your seeds are, like, not so bad. But now it's time like, to get serious." she responds as your shapeshifting girlfriend/sister climbs on top of you and grabs your cock and guides it to her pussy. You help your sister by sitting up and grabbing her hips to help aim her. With a little more movement you can feel the head of your dick start to spread her little lips.

In one quick shot, your 'sister' sits down onto your rod and gasps. You had to admit she was tighter than the girl you knew as your former girlfriend, but even so she started moving. As her up and down rhythm got faster, you start to suck her boob as she's moaning loudly. Soon you could feel a turning in your balls, and you make your final push towards release. Your sister seemed to be giving signs she was ready to orgasm too. You both sit up a little more while still thrusting and bouncing so you can see eye to eye. While in this position you look into her eyes and the only thing you can see in this cute girl is nothing more than your bratty 'sister' whom you love. With this, the two of you kiss as you explode deep into your sister which brings her over the edge as well.

With the act over, and both of you exhausted, you lay back with your 'sister' still holding onto you. You can still feel yourself inside of her, but neither of you care. "Now that's like, what I wanted from my great brother." your 'sister' smiles. "Let's say we keep it going, shall we bro?"

"If that's my 'sister' wanted, then your 'brother' will always help you with that." you finish as you both kisses each other.

"Children, lunch is ready." your 'mom'/Claire comes out as she's already prepared all the lunch she made for you three. You both broke the kiss as you and your 'sister' stand up and walk to the dining table and ready to eat. You can see Claire in the form of your mom who has a great naked body wearing her apron. "Seems like you both enjoy with each other." Claire says. "Why don't we finish this lunch so we could enjoy some more?"

After a few moments later, you all finish the food as you're all full. Then,...