Teigen, who is also a cookbook author, has two children with singer John Legend – Luna, 4, and Miles, 2.
Late last week, she said her breast surgery went "perfectly" and shared two notes she had received from Luna.
"Bye boobies," one read.
The other said: "Have fun pulling your boobies out. Love Luna."
Teigen said she was "so so so so so sore" but the note made the pain go away "for half a minute at least".
On Twitter, she wrote: "Surgery went great! The note I woke up to is the absolute best part".
In late March, Teigen marked her "10-year anniversary" since getting her breast implants.
She said she had kept her cup size but "filled them out so they are rounder and firmer".
"I did my boobs when I was about 20 years old," she told Glamour UK.
"It was more of a swimsuit thing. I thought, if I'm going to be posing, laid on my back, I want them to be perky.
"But then you have babies and they fill up with milk and deflate and now I am screwed."
Teigen said having children had made her consider the risks of going under the knife again.
"This is not the way I want to die, in boob surgery," she told the women's magazine.
After making the decision, fellow model Naomi Campbell sent her best wishes for surgery.
"Be safe," Campbell said.
English singer Natasha Bedingfield shared on Teigen's Instagram post that she missed "having big boobs from breast feeding but smaller is so so much easier to dress for sure".
Teigen is now embracing what she calls her "pure fat" boobs.
"Which is all a tit is in the first place," she said. "A dumb, miraculous bag of fat."
