Communication is the key.

Arthur looked over at the goblin. “Mata, you won’t think it’s strange if Kira calls me sir.” She nodded. Why were some things easier than others? He wondered what other buried fantasies he could bring to the surface. Kira had reacted strongly to the idea of being dominated, and he was certain Mata had a wealth of hidden desires. He thought for a moment.

Time to test the waters. “Mata, what’s your deepest fantasy?” Mata flushed “I want to get pregnant. I want to be filled up with no protection. I want my tits to get bigger and leak every time I fuck!” Her breathing sped up and by the end of her confession she was practically screaming. “Want to be breeding pet!” She had started rubbing herself, using one hand to massage one of her tits and the other to stimulate her clit. Arthur wondered if he needed to change anything about that. Nah. “Okay Mata, from now on you’re my breeding pet, and you don't mind sharing me, at all do you?” She shuddered, pistoning her fingers in and out of her dripping wet cunt. "Not mind sharing." After the last of the aftershocks faded she returned to the neutral state that the trance demanded.

His cock had been hard during the entire display.