Be careful not to push her away from you, remeber she choose you and you are enjoying her beautiful little body, it is a journey you need to make together. Many women do not watch porn so just watching it is a turn-on as long as it is what they will want to see (not just blowjobs, attractive males, respectful of women and positions, not jackhammering, female is similar to her in attractivenes, etc). Sure a large cock will likely turn her on, as will other normal kinks like body types and etc. she will get super wet, especially of she rarely watches it. While you eat her out, what gets her more turned on and more wet? Vary what you do to find her kink. More stories, more cock, certain types of videos, role play, sex toys.
But be realistic to what she finds pleasurable, most porn is made for men due to consumption. To be simple - it if is just a hard cock being shown and a female with a perfect body, then that is largely porn for men and best avoided. Interracial porn is one of the few types where women are more often shown getting pleasure, and males are more attractive. Find it first for her to watch. While she is watching, tell her you want her to imagine spreading for a guy like that, that you want to find her a fuck buddy who will stretch her out and let her just enjoy his cock and big balls. That you want her on birth control and that you will make sure he is safe so she can take him bare. When not having sex, talk about showing her off to other men, however she wants to, maybe wax or shave or just her beautiful little pussy the way it is. Does she prefer creampies from you? Does she like come on or in her? Be on birth control, makes it all more spontaneous. You can help with this forum to find her a bbc that will pleasure her and be safe, as well as being the big cock she wants, being respectful of limits that you both want. Go slowly and carefully, it is her little body after all and you want a bull with a thick cock to send her home after being balls deep in her, not a boyfriend for her.