How could Cane not know alpha Colter and Koda's intention, they had been very adamant to meet with Iris to make her checked on the baby's condition. They wanted her to cure the baby. They had been waiting for this opportunity for long and became very anxious when baby Vemion's condition worsened.
That was why, they were thrilled when they learned Iris would come as well, though they were a little bit confused of how Iris could be suddenly in the Black Market when the last report they received about her was; she was still in the Bloody Wolf pack.
But, that was not a problem right now, since they she was already here, the baby would have a chance to survive.
The curse was very cruel. It didn't make the baby died immediately, but it gave the baby a very slow and painful death, giving them hope and then crushed it into pieces if they couldn't manage to save the baby.