likely because the pill still got into her. it's also not likely that you would have gotten her pregnant anyway because you put on a condom before finishing. pre-ejaculate doesn't usually have sperm in it unless you didn't urinate after your last ejaculation.
my girlfriend dissolved a plan b pill in her (frappe)coffee was it still effective? . i pulled out before ejaculating and then put on a condom and finished/ejaculated inside of the condom. two days later she tried to swallow a plan b pill but threw it up because she has a very sensitive gag reflex. however some of the pill dissolved in her mouth. the next day she dissolved another plan b pill in a very small solution of water and put it in her frappe coffee. she drank all of it. is it still possible that the dissolved pill was effective?