When a girl walks down the street in such a short skirt and with an anal plug, it's clear that she's looking for an adventure for her ass. Licking ice cream is just an added touch to this image of a bitch. So her verbal signs were quickly understood and she even squirted while being fucked in the ass.
That's the right thing for a brother to do: get his sister in the ass and let her pussy be used by her hahali. And he, as a relative, should have more rights. And the blonde herself doesn't mind-weather in the house is the main thing!