Ishtar was being ignored and she hated that, but she also didn't like the idea of being destroyed so completely it wasn't just a layover in death. As such, she was trying her best to not evoke that kind of anger while trying to get between Sukuna and Ereshkigal. Of course, she didn't realize that kind of meddling normally backfired for her. One such instance was right now, as Ereshkigal received a bit of information about her apparent newborn source. Swirling was normal for newborn sources because of natural fluctuations, but the kind of problem she was experiencing was hypothetically due to the fact that she'd been created with a different original purpose in mind than death and the conceptualizing of it that she'd originally taken on. Actually, that made a bit of sense.
When she had been young, a then named Kur, had heard from her mother about the original plans of the gods and how they were supposed to slowly introduce concepts back to the world. A specific order was originally thought out, but it was all tossed out the window when Ishtar demanded the concepts of Love and Beauty when she'd originally been meant for something else. With that in mind, Ereshkigal knew what her mother had originally built her for and what she'd ended up with. And what else did she know? Well... she knew how cores worked. Cores, were empty shells that you can place things into, and take other things out of, split or combine as you liked. The cores of the gods had originally been filled with specific Authorities and those had been distributed at birth or as needed. Her own was filled by her own conceptualization of death when it was originally meant to maintain the pre-existing concepts of love and beauty. They were things that weren't necessarily meant to blend so obviously it would be difficult to do so on their own, thus the problem of her settling source.
"Hm, I think I get it," Ereshkigal said and then she rather strangely... took a seat. Right atop a floating scythe with its blade poking into the ground she balanced herself and closed her eyes. "Oh great. Now we get to watch her study. She's really going to ignore you to create or whatever dumb thing she's doing... doesn't that bother you?" More from Ishtar trying to sow animosity between these two, this could be her way in, she was sure of it. Never mind that the state of flux in Ereshkigal's Source was also causing Sukuna pain, and never mind the fact that she was definitely a Creator and thus it only made sense when she was interested in creating. Ishtar didn't realize that she was the problematic one in these conversations that kept popping up.
Obviously, Ereshkigal needed to do a bit of interacting with her own self and she could manage that, given her understanding of cores. So, she took that process step by step. First acting as she would when looking to make adjustments to her core, and then, searching farther beyond that to the strange shifting feeling within her own chest. In a moment like this Ereshkigal would find that Sources, unlike cores were moving rather swiftly. Cores were just still with stuff inside, it wasn't a problem unless they were shaken, in this case, two different feeling kinds of information were moving around each other so fast she couldn't even begin to separate them. In fact, the idea of touching them in a moment like this made her shy away from it. Obviously, she'd just received the information that such an interaction was dangerous. But she was certain she could have managed it under some specific circumstances. She just needed to concentrate more. And.... she'd actually managed a decent bit of concentration while under the passive effects of Sukuna's mana. Actually, now that they were tied to each other, he could probably help her keep stable while she teased those two cores apart.