"I told you I was seeing someone, she's been here when you were here. Just cos I don't cook three course breakfasts for the people I sleep with doesn't mean it doesn't happen." So Lyra had had work to get to and hadn't stuck around, or they'd stayed in bed until Armaan had left the house for the day. He just didn't want people to know things because then they could leverage it against him- case in point, how quickly his parents were squawking about the wedding once the frat knew (how did the frat find out?)
If Lyra wasn't sitting on him, he'd probably have got up and started pacing. As it was, his leg was jiggling, betraying his discomfort. "And you never said you were happy neither," he grumbled. "I accept that you're tired, and I'm sorry we got carried away or whatever." He shrugged and looked down at his nails. "Nobody likes being told they made a mistake, and so far exactly nobody has been just happy for us."