I think you should have tried to pull her before taking her to an after party.
Escalate the make out hard in your car and go for the bang there, or either suggest you go by your place for a drink while making sure you tell her nothing is going to happen and you'll only be a few minutes. If she suggests you are trying to have sex with her by doing that just apply LMR tactics 'We are not going to have sex, I don't with someone I just met...'
I don't know this from experience as the couple times I have pulled I didn't have to do this but it seems very possible given the circumstance (makeout + her being isolated with you).
Escalate the make out hard in your car and go for the bang there, or either suggest you go by your place for a drink while making sure you tell her nothing is going to happen and you'll only be a few minutes. If she suggests you are trying to have sex with her by doing that just apply LMR tactics 'We are not going to have sex, I don't with someone I just met...'
I don't know this from experience as the couple times I have pulled I didn't have to do this but it seems very possible given the circumstance (makeout + her being isolated with you).