Honestly, if I were you I wouldn't bust inside her. Girls can piss you off but it isn't worth it to bust inside her, at least if she isn't on the pill. I would fuck the shit out of her, with a condom and then leave her. If she likes you she'll come back, they always do.
So you want to bust inside her because she's being annoying? Well there's a bunch of legal paper work that's going to run into you in the future. If you bust in her, expect a child in the next 9 months.