Well, half-brothers and half-sisters are not related at all, so it can't be considered something bad or immoral. It's no surprise that an adult guy and girl, with no regular sexual partners and almost daily being around each other, suddenly felt attracted on a sexual level to each other. Considering that the girl liked it (the guy then no question), I think they will continue to practice this kind of thing from time to time.
In a chat room you can show a lot and please the males. And for them to cum on her, the blonde shows her skills. I think there are hundreds of strawberry lovers on the other side of the monitor jerking off to this beauty!