GAIN and LOSS

SO my girlfriend Kate had her 2nd little girl about a month ago and I cannot believe how GOOD she looks! I seriously didn't look like she does until Gray was 5 or 6 months old! So I got to ask her about what she's been doing because technically you're not supposed to do too much exercising until 6-8 weeks post partum. Well she said a lot of it seems to be that she it has to do with ahving her second because she didn't look this way after her first which made me feel a little better. Obviously everyone's bodies are different but hey it gave me some hope for when I can have another one. haha She also said she doesn't feel she gained as much because she had to stay SUPER active to keep up with her 2 year old. Anyway this may be lame to some of you but it gives me hope for when I can have a second shot! : >

What do you do!?!?!?!?!