You messed around with the Chronovac and found that you could alter which changes people were aware of. Interested to see what would happen you basically turned off Emily's awareness of her aging and made the universe correct for those changes. You then left the Chronovac and went downstairs to find an 11 year old Emily with a training bra and shirt ripped open by really large breasts.
Emily blushed and said "Don't Look!" the girl was rather self conscious about her breasts. She was attempting to cover her breasts with her hands however you could see she wasn't doing the best job.
you said "Alright then, um i'll go and leave you while you... get yourself better." You then went and walked to a bathroom for a few momments until you heard your sister go into her room. You then went out and decided to watch some T.V.
About an hour later you were wondering what was going on with your sister when you started to feel a tingle. You then remembered that the Chronovac app was still open and you rushed to see what Emily was doing. It took you a few seconds to get to your room and see that Emily as your 16 year old twin. She looked pretty with nice long straight black hair, C-cup breasts, a nice little ass. You quickly asked "What are you doing?"
Emily said "Oh you noticed me changing you a little? Well since my breasts had just expanded I went into a panic and then remembered you had this new app and found out what it did. My breasts went back to normal by themselves but I decided to try something myself my naughty Twin brother. And don't worry I switched off that age thing you had on me without turning on that awareness feature. I enjoy being equal to you instead of being some annoying little sister which I probably was."
You asked "So what did you do to me?"
Emily smirked and said "...