ASTRID looked at his brother suspiciously. Since Reas returned from his date with Lauren a couple of hours ago, he had been acting weird. For one, the corners of his lips had been up since he came back, and there was even a light bounce in his steps. All of this showed his good mood right now.
He's not saying that Reas had no right to be in a good mood. It's just that the whole situation seemed suspicious. Reas was obviously acting this way unconsciously, which made it even more intriguing. Normally, Reas didn't have much expressions on his face, so seeing him this cheerful and lighthearted was unusual. It made Astrid wonder what had really happened during that date with Lauren.
Because, obviously, his brother's good mood right now could only be related to Lauren. Especially considering that Reas had just returned from a date with the other.