Got this girls number a week ago texted a few days later she was real responsive, told her we were going to lunch a few days later and she said "im going to be at my familes cabin till next week.... but Definetly after that

" she really is up there for sure it wasn't a lie.
today I texted her and found out she was coming home tomorrow (Monday) and said let's get lunch on Thursday.
its been 4 hrs and still no reply. since the first time I texted her she has had her older sisters with her and im almost positive they have been involved. so what gives?
I'm thinking either she is genuinely busy and will reply later
or she already plans on saying yes but wants to make me sweat for a day (fuckin bitch)
One final thing to add is i recently found she has a bf. she has not told me and does not know I know. when I got her number and texted her it has been very clear I'm not looking for a friendship and she has not even come close to saying she has a bf.
I sure as hell don't expect her to drop her bf for me as I do not know her but I guess its possible she is waiting so long to reply to figure out how to deal with the situation.
what do the more experienced people here think?