1) it was about midnight2)right before, she had gone to play basketball at the park with my sister and sweat a lot before that while i was at work. ... wait she did seem pretty determined to take a shower before we did it, said the sweat was bothering her and i was like why take a shower just to get dirty again and was wanting to take one afterwards.
3)she seemed pretty into it, did it twice in a row.
4)id say it's serious, only reason i got is that she flirts with pretty much every other guy(in front of me or not), and she claims she's just a natural flirt and gets really pissed off when i bring it up lol