Quick q

Pre basis. I hardly ever text girls back right away for example I sometimes wait anywhere from 30 to a couple hours to reply. So I send this girl I’ve been talking to a text a couple hours later and she replies instantly so since my screen was still up I decided to do something out of character and do the same. I know she saw the text that much is obvious and I’m confident she will reply tomorrow morning when she wakes up. Surprised she was still even up in the first place, normally she doesn’t stay up after 12. But why would she wait until tomorrow morning to continue the conversation besides the fact of catchin some z’s. I have my opinions, but would like to hear some feedback if possible. Thank you and have an awesome 4th of July weekend