Love it but here is a suggestion

How about adding something where your own voice can be added. You could sing a lullaby without having to choose one from a music library. You could sing it your self and record it for future Play back. I would suggest is as a new feature that you dont have to unlock. Why not add a feature like rock the cradle. You have a cradle but you should be able to rock the baby to sleep in the cradle. I am a visually impaired user so when rocking the cradle, maybe you could add a kind of the rocking chair or a wooden squeak sound thats not going to keep the baby awake

Dustbuster4676 about My Baby Sim, v2.1.5