Enter the chamber and get ready for some pleasure.
Approach the bed and go for it. During the QTE you will have to press three basic buttons, move the left stick, move it round and then to the sides, hit Circle 6 times at the right moment and finally mash the same button.
Before you enter the Hyperion Gate, collect the precious items from the area. On the right side (while looking at the entrance) there are two experience chests. Next to the Gate you will find a Minotaur Horn [!!!].
The most precious item is hidden on a barely visible platform behind Aphrodite's bed. Glide the (you have to jump or you'll fall into the pit) and pick up Aphrodite's Garter.
Now you can use the teleport. You will once more find yourself in the Forge. After the cutscene, head through the newly opened door, leading to Tartarus.