At that moment, Elora suddenly made a short hand movement, and unbeknownst to anyone except her and Erik, severed the connection between Emma and Emily. This was a condition Erik had put on Elora's little scheme.
Naturally, Emily wouldn't actually lose her virginity through that sigil, but it would still be cruel to make her suffer the feeling of it, without anyone there to support her.
Emma looked up at Erik lovingly and began to raise herself up, followed by Erik's cock, as it was no longer kept down by Emma's weight.
When she could go no higher, but noticed it still wasn't high enough, she put her feet under her and kept rising, until she was crouching, with her wet snatch hovering just a few millimeters above Erik's stick.
She thanked her lucky stars for that sigil, as there was no way she would have been able to keep her balance right now otherwise. Not without her hands, anyway.