Do nothing

You can't explain to yourself why, but you just stand there and watch as Vladimir grasps his cock and lines it up against Abby's pussy from behind. Once he finds the right position and angle, he plunges his cock down and into Abby, causing her to gasp. Vladimir continues with a few more long but slow thrusts, until he finds his rhythm and starts pounding Abby hard. You can tell she's trying to keep as quiet as possible by clamping her lips together, but the repeated forceful jabs overwhelm her and she ends up gasping for breathing and moaning sensually at the same time while she hangs onto the bed and braces herself.

Even though it's Abby, you find what you're seeing really hot and you can feel your cock straining against your pants. As Vladimir rests his hands down on either side of Abby's body like he's doing push ups, you look over at Ekaterina to see how she's taking this in.

Now that the action is underway, she's no longer distracted by her phone and is watching her brother and Abby while holding her phone's camera pointed at the bed. Quietly, you make your way over to Ekaterina's side to look at her screen and you see that she's livestreaming the sex on social media. It looks like she's getting quite a lot of likes and viewers and you can see the action on the phone screen that's happening not far away from you. While Abby's face is visible, Ekaterina has the camera angled so that it doesn't show her brother's face. You guess even a crime boss wouldn't want his face out there in a sex tape. You wonder if he knows what his sister is doing. You're about to return to the bed for a closer look when you notice that Ekaterina's legs are parted and her free hand is up the front of her short dress, obviously touching herself while watching her brother fuck Abby.

"Fuck! Fuck! Fuck! Fuck!" Abby moans on the bed as Vladimir pounds her relentlessly. His body is ripped and from the way he moves his body in repetitions, it almost looks more like he's working out than having sex with a beautiful woman. The look of concentration on his face adds to that and he's breathing regularly through his nose.

Just when it looks like Vladimir could keep going on forever, he suddenly stops and pulls out of Abby. She's surprised and at first she turns around on her back and spreads her legs, thinking he wants a change of position, but instead he climbs off the bed. Then, with his cock still hard and glistening with Abby's juices, he turns and walks towards you. You're startled and begin to think about how you want to fight him, when you remember that you're invisible and that he's walking towards Ekaterina. Stepping back, you watch as Vladimir approaches his sister. She's still livestreaming and his cock is getting nearer and nearer on the screen while his face is still hidden.

When Vladimir reaches Ekaterina, she turns the phone around and winks at camera before handing the device to him to keep streaming on her. Then, she leans forward to wrap her lips around his cock and proceeds to suck his meat furiously. He cums almost instantly, grunting softly as Ekaterina swallows his semen. The scene reminds of you of the club when you had brought Sasha to Vladimir and he had fucked her in front of everyone but finished in the mouth of 1 of the Russian woman around. This is now the second time you've watch Vladimir fuck 1 woman and finish in the mouth of another. You wonder if it's a fetish of his or something else. Ekaterina isn't as good at swallowing as the other Russian woman and some cum escapes her lips while she keeps sucking on Vladimir's cock, dripping to the floor. When Vladimir is done, he hands the phone back to her and steps away.

On the bed, Abby is looking on and stunned at what she had just seen. She looks like she's about to say something when Vladimir speaks first. "You can go," he says dismissively, waving her off. Dumbfounded, Abby quickly climbs off the bed, slips on her panties and dress, and hurries out the door.