Albus nervously looked around him to make sure nobody had seen, but Lily looked unfazed and unperturbed. She was unafraid of the rival house and didn't care for any consequences incurred from breaking the rule of entering said House in the dead of night using floo powder (the magic powder that had allowed her to sneak in through the fireplace).  She did have something important to say, though and wasted no time taking a seat opposite Albus and getting it off her chest.