If there's one word that describes Pine Grosbeaks, it's "tame". You can get amazingly close to these birds without flushing them. They're usually pretty docile, just eating crabapples from trees or picking away at what's fallen on the ground.
I'm not sure if these two are adult female and juvenile because this behavior could be interpreted as "the juvenile begging to be fed". Otherwise, it was a "hey! that's my berry!! let go!!!" kind of spat.