Richard was in a much better condition the next day.
Was he embarrassed as all hell and wearing a turtleneck? Absolutely. Had he also pulled Maxwell aside to thank him and ask for more advice? Also true.
Andrew pretended to not hear a damn thing, for his own sanity, and for the sanity of Richard who was new to this world. He hadn't really been getting down and dirty with anyone prior to this, and he was a private person in general. Especially compared to Rose, and even more so when compared to Andrew.
Andrew would introduce his 'friends' to one another when he'd been out and wild. He had a feeling Richard would faint if he'd slept with two people and they happened to meet in passing at a party or something. It was best for Maxwell to handle this aspect of him becoming an omega, since Andrew didn't want to hear it, and probably would laugh in the other man's face.
So, Andrew turned a blind eye, shut his ears, and focused on breakfast, and his baking.