Thank you for writing!
Nobody can give you a fully accurate answer. That is what pregnancy testing is for.
Since this woman took emergency contraception after having sex three times, her risk is very low. Her risk of getting pregnant by you would be higher but the large dose of hormones in her system from emergency contraception may protect her somewhat.
So if she does become pregnant (you will need a pregnancy test), you would be more likely the father but there is no guarantee. To know for sure, a paternity test will need to be done.