It was his favorite outfit on her. He’d slide his cock down between her inflated tits, enjoy the friction of the smooth skin between those firm, artificial globes and then cum, down the dress until he was spend.
She’d clean his cock with her mouth and suck him back to hardness so he could use her in some other fashion - or the same, if he liked.
The dress, of course, would stay on for the rest of the day, including the cum. It made so abundantly clear what her place was with every move.