THIS IS ABOUT SIMS FOR THE ANDROID, NOT SIMS FOR ANY OTHER SYSTEM OR DEVICE.
You can not relax in this version of the game, you only are allowed specific amounts of time to sleep, which is about four different options. You do not get pregnant in this version of the game, as the game clearly informs that you click on the crib, add a child, and it will be DELIVERED to your family. For some reason the add a child prompt is not coming up.
Please stop including advice for any Sims game that is not the Android Mobile version of the game. There is no "rest" feature in this application. There is no pregnancy faze in this game.