Jenna opened the envelope containing the invitation given by Clara, only read for a while, then put it on the table. Without needing to look at the map or the content of the invitation she already understands what to do when she gets a dinner invitation.
Regarding John's address, it is possible that Blake knew it. Because Blake often communicates with the man to ask about Jenna's condition.
Clara lay down on the sofa, staring at the ceiling of the room they were in. This was the first time she had come to Blake's apartment. However, since she first went inside, she had already felt Blake's aura there.
Without realizing it, her smile was falling. However, when she realized that Blake was no longer alone, even married and impossible for her to have, her mind seemed to tighten again.
Even more sickening, again it was Jenna who managed to get Blake's heart, not her. A fact that always makes her fall and must mourn the fate.