She made it perfectly clear that it was a one time thing, so no matter what she does with José it's definitely not NTR.
They were friends, then they fucked, and now they're still friends; happens ALL the time. (Well, in the US it happens all the time, anyway...)
Either way, she made it plain as daylight that humping him was a casual thing; just helping him chuck his V-card, and helping her blow out the cooch-cobwebs.
Banging a single time does not imply ownership; thinking it does usually prevents further banging.