Of course Apollo had considered the possibility that Rosario could end up being his. When you thought about it, the odds were (if he did say so himself) pretty fucking high. Take things like 'who has the most sex' and 'whose virility is the most impressive' into account, and surely it was probability rather than possibility.
Besides, Rosario was studying medicine. It's not like she was going to turn out to be Ares' kid. (Hah, sick burn. He had to remember to tell Hermes later.)
Add in the face of the woman on the phone, and the puzzle pieces slotted together like a dream. Apollo flashed her a bright smile, searching his memory. He didn't recognise her straight off, but then, he couldn't have said how many Carlas he'd slept with in the 90s.
Not that he allowed himself to look like he was trying to place her. Archer had never seen her before, after all. "I know, the name's a lot," Apollo told Carla, with a good natured, easy laugh of a young man assuming her reaction to his name was simply due to its grandiosity, a shrug that said it wasn't his fault he was born into this legacy. "Blame my father. Or take it all the way to the top and blame his father."
"My mom nearly named me after her," Lyra said, oblivious. "She said literally the only reason I ain't Jemima the Second was she still had painkillers floatin' round her brain when she registered me and she forgot she was gonna. Thank my lucky stars for drugs, right?"