Rick was not able to find what or who Emily had became, and where Emily gone, especially as a 6 years old girl. However it was not difficult, rather impossible. Eventually Rick gave up both of finding Emily and using the camera. Anyway, it had just made his girlfriend dissappear(or Rick thought so) and it seemed to be too risky to use it.
But Rebecca kept the camera. She hidden it inside her room, and brought it whenever moving house. Although she did not wanted to used it, she thought it was worth to do, and keeping it away from case of being used by someone else was needed.
20 years had past, and Rebecca has used to her newly given life. Actually, it was not so bad to live a life as a girl. Her parents were good, she enjoyed her second school life, and even made a boyfriend. Eventually they, Rebecca and her boyfriend, Josh have married and had a child.
But Rebecca didn't know she found Emily. To keep Emily as Rick(or Rebecca)'s daughter, it sent Emily to future where Rebecca is finally pregnant. So Emily became a fetus, from a girl, but still a daughter of Rebecca.
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Emily woked up in somewhere small place. She could not see or hear anything. She didn't know anything about why she was there after she take a photo of her boyfriend playing as her "mother", what or who was she if she transformed.
Well, second question was the matter of time. As she grows and noticing better of outside, she recognized she was a fetus, in Rebecca. She could a just helpless unborn fetus, only could wait, until her (re)birth.
After a few months, Emily got finally born. Somehow, maybe because of Rebecca still feeling guilty of girlfriend of her life as Rick, Emily's name was Emily again, conveniently.
But, their circumstance with the camera did not over yet. Both of Rebecca and Emily knewthey had transformed, and the camera was still belonged to Rebecca, kept hidden in her room.