Two Girls and a Demon walk into a bar...
The couple dates so far with Aine have gone well. There was drinking - lots of drinking - and they're both flirty, outgoing drunks. There was karaoke, there was table dancing. All in all, this worked.
Relations with Irina are, in Nick's mind, perfect. No strings, no fuss. Lots of vodka. Now and then, she shows up naked. It works, and she's right there.

Dating Aine, on the other hand, is kind of a pain - she's on the other coast, and he's not a sappy e-mails kind of guy - and suspects its not her style either. He likes the drive, but it still takes time. And, then there's the fact he knows a teleporter.

He called to set up a meeting at one of Aine's favorite bars, and let her know Irina was coming along - drinks were on him. After all, if she's likely to have a huge problem with the fact that he's sleeping with Irina, at least while they're in casual stages, then dating a demonblood likely isn't the best idea anyway.