Eventually, Harry let them over to Grimmauld place. The fireplace was situated in Harry's office. Everything was a little cluttered in the Potter house and this room was no different. The desk and shelves were overwhelmed by textbooks, children's drawings, and odd souvenirs. They didn't leave very much room for Teddy to escape to when Draco finally let go of his shirt.

Between the exchange of insults, Draco was able to get his information across. From what Teddy could glean, the white potion suppressed a werewolves' transformation. Draco was convinced that if a werewolf couldn't transform on a full moon, it would die. He cited convoluted theoretical research that Teddy had never heard of before. Then he started talking about the preliminary experiments he had done back at his lab on Teddy's donated tissue.

At this point, Teddy was trying to back out of the room without drawing the attention of either of his Uncles.

"Teddy," Harry snapped and Teddy straightened, conditioned by years of having Harry as his surrogate father. "You let this madman experiment on you? How could you let him know about your secret?"

Draco snorted. "That he is a werewolf? I figured that out the first year he started changing. I'm not an idiot, unlike some people," -Harry glared at this- "and who do you think was poly-juiced as him at Hogwarts?"

Teddy froze. When he was back in Hogwarts, they had decided it would be less suspicious if someone took his place during the full moons. Harry had recommended Ron. But neither Ron nor Teddy wanted this option. So, without telling Harry, Teddy had asked his Uncle Draco instead. Draco had agreed more easily than Teddy had expected, making him a little uneasy. When the first year passed without any pranks or disasters, Teddy finally relaxed.

Even so, his friends had always said that Teddy was a jerk once a month and his girlfriend had teased that he had PMS (which Teddy very very much did not appreciate). Still, it was a small sacrifice compared to being replaced by his Aunt Ginny or, Merlin forbid, his grandmother.

Harry was still choking in disbelief. "Him- you? Hogwarts?"

Teddy was torn between trying to explain himself and bolting. Seeing Harry's wrath increase with each exchange, Teddy was pretty sure leaving was the safer bet and started slipping towards the door. Harry stopped him with a glare and an accusing finger. "You, we are talking about this later after I deal with him." Harry's finger jabbed in Draco's direction. "Just know you are banned from Lilith's case."

Teddy forgot about his escape. "What? I- we just cracked it open and you are going to throw me off of it?"

Harry shook his head. "You're off and that is final."

Teddy returned to where his Uncles were standing and tried to argue the point. Harry wasn't listening and Draco didn't help. Draco did try, in his way, but it seemed to incite Harry rather than do anything productive. Finally, Teddy had to give up and leave before things got even worse between them.