Russian sales representative Anna Ozhigova, 33, had a nose job which she believed - made her nostrils oversized and meant she could no longer smile properly.
Friends say the surgery was the trigger for the failure of her marriage, leading to a split from her husband and a chain of events which left her without hope.
Although she found a new boyfriend, she feared her businessman husband was about to secure custody of her son Gleb, eight, they said.
She jumped to her death from her parents' ninth floor apartment in the Siberian city of Omsk on 13 October holding the boy in her arms, reported the Komsomolskaya Pravda newspaper.
His body was found close to hers.
It was revealed that earlier she had written on social media to a friend:
"The surgeon convinced me that my nose didn't suit me.I'm easily impressed, and he convinced me. He was saying he would change the shape just one millimetre.""I can't smile. My nostrils are now as big as if I was a pig, and moving apart.She told how she wore full make up when they were together in the evening but "he's known me for 12 years and can't get used to me now.I'm also having problems with my facial expressions. He says was stupid to do this surgery."
"My smile is now a frown because he removed muscles above my lip and changed something. My husband is oinking when he sees me."
She stressed: "I can't accept the idea that I'm going to be like this forever. I have a child, and I live for him. I'm going to a psychologist."
That led to a fear that her son could be taken away from her.
"That was the last straw," said the friend.
A note written before she jumped to her death said: "'I wanted happiness, kindness, and peace for Gleb. But he's growing up in anger."
She WAS ans IS(even in death) STUPID!.... Whites are somehow!... The husband is INSENSITIVE