Today I saw my 4 month old son defending himself from his sister for the first time.
Ema who is 6 years old was waiting for a brother for many years and when his wish is fulfilled, she really believes that it is her doll, she calls it little cotton cloud, she does not stop hugging him, kissing him, grabbing her cheeks in the end all day on him.
Gabriel before the demonstration of excessive love of his sister, grabbed her face and began to scream, it is as if he had said: enough!!! Ema and I did not stop laughing; luckily I managed to capture the moment.
Thanks 
@dikarina