Selina never meant for this to be anything more than casual. Mostly because that's just how she does relationships. Casually. She's independent, she's content on her own, and she doesn't like to get too attached. Relationships are nice diversions, it's pleasant to have some company when she desires it - and a body in her bed, when she desires that - but they aren't something she considers necessities. They're not serious.
But this whole thing, with you and her? It's starting to get a little serious.
She's not sure when it started. The first time she spent the night at yours? Or the first time she let you spend the night at hers? Maybe when it became acceptable for you to leave your tea mug and other sundry day-to-day items in her cabinets. Maybe when she realized she had a drawer in your dresser that she was fully comfortable leaving some clothes in. Or was it when she let you hold onto a spare key to her apartment? You know. For emergencies. It only seemed fair - she'd had your key on her keychain for a month by that point.
Whenever it started, Selina has to admit that she is, right now? Definitely in too deep.
Case in point? It's a little late in the evening for phone calls. But here she is, her cell phone to her ear, listening to it ring and thinking it would be a shame if you'd already gone to bed. Because she kind of wants to talk to you.
Just to talk to you. Just to hear your voice. And that's probably a sign this has gone beyond casual, isn't it?