After they had arrived on Vulcan, T’Mia closed the doors to their shared astral rooms. She had used their shared dreams to catch up on each other quickly on Earth, but after Sarek and Amanda had arrived she had shut him out their shared space, not always successfully but most of the time. After the blood adoption was carried out her control increased to a degree that made it nearly impossible for Spock to push through and reach her in their shared dreams.