Jon taps around looking for the light switch to the lamp on his night stand, before flipping it so that he can better see the intruder in his bed.
Turning on the lights he sees what appears to be a blonde woman wearing a wedding gown. Awoken by the lights she sits up and turns to face Jon.
-- "I guess the stone ended up picking you."
Jon stares in awe, he recognized the voice as Karyn's but she looks very different now. Her face has changed and could easily be the most beautiful face Jon's ever seen. But above all, her breasts seem to have further doubled in size and the rest of her figured changed to perfectly compliment it.
-- "A-am I really that pretty?" says Karyn blushing "Wow just knowing that you find me beautiful makes me feel all warm inside. It might not be so bad if everything is like this from now on."
Karyn stands up and starts walking towards Jon's bedroom door.
-- "Would you like me to prepare you breakfast and introduce myself to the rest of your family?"
-- "I-ugh, no please wait I need to..." Jon stops himself, he was about tell Karyn about his dumb wish but starts to reconsider. Maybe telling her the truth would make her hate him? If he can't find a way to fix her, Jon much rather be married to a Karyn turned absolute bombshell that likes him then one that hates his guts. Jon needed to wish to find out what changed, but first he needed to get away from Karyn so that she wouldn't know that he accidentally wished for this.
-- "Karyn listen, I-"
-- "Karyn?!" exclaims Karyn surprised "Oh you've already picked out a woman name for me, Oh I love it!"
"Woman name?" thinks Jon "Yet another thing I need to figure out for myself"
-- "Listen just wait for me here I need to go get... Something from the bathroom." Jon quickly comes up with.
-- "Something from the bathroom?" Karyn pauses inquisitively "Oh my aren't you eager, I'll be waiting then" she says while liking her lips seductively
Jon knew that Karyn was getting the wrong idea, but let it slide as he leaves Karyn to herself in his room closing the door behind him.
Due credit to 小野智 on pixiv for the images https://www.pixiv.net/en/artworks/102073820