My gf doesnt wantto hav sex and does sexually stuff to me?

so here how it goes dwn when we talk about having sex we want to it and stuff later on she says we should wait till we r alone but whe i see her w start coming on to each other ad do sexual stuff to each other and r ready to hav sex because i hav the condoms nd she says she wants it but we arent alone in the house or room and stuff and we r under the covers and we talk about it to be special and than we hav sex for like a couple seconds but why would she say we should wait and than we just did it right there and than i confused cuz i really respect what she said and i wanted to be safe as well when we did