Astra was very sensitive to the presence of Monsters, so he could easily pinpoint the Lair of the Satyrs.
When they got close to their lair, Iris could vaguely hear the voices of the women suffering pain and pleasure at the same time.
Knowing what was happening, her face immediately turned grim. However, she contained herself and didn't charge recklessly. Instead, she stealthily snuck towards the location of the sound, using the trees as cover.
Astra had recovered enough to transform into his demi-human form again, but he knew that he could only use it for a limited amount of time.
Even so, he needed to be in his full power in order to protect Iris from the Satyrs, who were busy fornicating with the Rankers that the Succubus Queen had given them.