No, no, NO. This isn't happening. He's not going to switch topics on him. This is Waver's consultation and unresolved feelings.

"Yes, um-b-by observing how Ritsuka and all the Servants bond during missions," Roman tries to amend his slip with a tight smile. But the way it seems he's forcing to look at him when his eyes sometimes wander to the cake may give it away.

Cross his heart. Please believe him.