At some point during the pillaging of Kur's mouth and throat, words of that strange language were spoken but didn't seem to be directed at anyone in particular. At the very least, Kur was certain she felt no extra compulsion even as he rammed himself in and out of her mouth and throat. She was choking and gagging repeated, and his roughness had spittle and tears mixing along her face. This sort of look was probably considered shameful, but she was only doing it as a matter of her own self-preservation. He'd let her go after he was done and she could go back to her quiet life in the Underworld for a while...
Ishtar on the other hand saw the look being given to her by Sukuna and figured he would have preferred using her for such a service. It was obviously a downgrade to have to use a virgin like Kur for the sexual tension he'd obviously built up for her. But that was fine, he could appreciate her glorious self while he abused the runt. That was fine with her. She continued beaming from where she was on the ground completely unaware of anything other than her own superiority and Kur's suffering. Of course, that last bit was coming to a raging halt, as soon enough a string of compliments were issued at Kur, obviously those kinds of words were just more false sentiments so he could surprise her with what came next. Soon, Kur had a pulsing member in her mouth and down her throat which exploded into spilled fluids. She coughed and choked and gagged as mana from this Demon mixed with her own in another massive transfusion. She was coughing and still not really getting over it, and Ishtar was laughing near hysterically! "What was that you said about remembering to breathe?! Look who's choking now bitch!" she plucked again. Look at her, she probably found the taste repulsive, she was too much of a 'sweetheart' to know that kind of glory.
It wasn't lack of air which enforced that coughing as Sukuna was removed from her mouth, it was instead the extra mana. Her body was suddenly buzzing again at a much higher frequency than it had been before. She was still frightened, but so full of power rather suddenly that she began to feel delirious. She nearly fell over to the right side but caught herself, only to recoil from the ground. Her hand making contact with it felt way too strange. "I... what... I..." she couldn't get out the sentence immediately but her body rather suddenly felt like it was on fire, but she also felt like her body and soul were separate. When she looked at her own hands, she could see almost three copies of it and each one seemed to have its own sensation. That forced feeding was one thing, but she still wasn't ready to be touched. She tried to back away, scramble to her feet and even try and wipe off her own face, but each time she touched herself or anything else she felt even more strange. "Too much... what... why, I feel...everything..." she was trying and it wasn't really coming out. Her body was also rather hot. She didn't want anything to touch her, she barely wanted her feet on the ground. Even the gentlest breeze felt like it was doing strange things to her skin. Why the mana? Her mind was sure he'd said something about that... what was it? Something about fellatio every morning for breakfast, but that was a mana transfer, she was sure she'd gotten mana from it, so was it not just because he was torturing her? Surely he didn't think everyone was as incompetent as Ishtar and incapable of utilizing mana being forced into their bodies. At a moment like this even though she was barely functioning she was sure she was metabolizing properly.