Make them a loose dress and stuff it with cotton balls or make the a fake clay stomach.
It will swell but not enough to make you look pregnant.
being fat
they cant because she actually is pregnant.
I'm not really sure what they are called but you can get special pads for your belly to make you look pregnant, I'm not sure where you can get them from as well. Hope that helps.
padding that makes her look bigger
You can not inflate your belly to look pregnant. This is impossible.
You make your sim look at the micrspcope until the aliens pick up he/she and later the sim will become pregnant.
There are many pictured editing websites on the internet. Some of these websites are capable of making an individual look pregnant.
Why would you want to do that?! Could you give an explanation
Make them a loose dress and stuff it with cotton balls or make the a fake clay stomach.
Most likely your sim has only been pregnant for a day or two. It REALLY starts to become obvious on the 3rd day. At least that was what it was in the sims 2.
Teens cannot get pregnant unless you make the adults shorter with a cheat to make them look like teens but even then they are still adults.