Heidi had approved heartily of the ring, and even more the wearer, giving Sarah her own round of slightly-less-suffocating embraces. After she had kissed the other woman on the cheek, there was the exhange of glances that implied further celebration would occur, with much gabbing, snacks, and a great more deal of hugging.
While Gabriel and Angela exchanged glees, she went to pry Peter from the pile. She paused to mouth the word, 'RUN' with comedic exaggeration behind the Petrelli Matriarch's head (The woman's presence in a pre-maritial setting was giving her all manner of wartime flashbacks to plate settings.). Once her brother-and-law was extracted, lifted with some amount of to-do from the floor, and spun once, she addressed the boy's inquiry.
"I believe," She paused to put Peter down and muss his hair. "It would make him your Step-Uncle."