Yesterday, Adam invited (among others) John, Peter, and Sarah to his party, which took place today. Sarah couldn't come because she got sick yesterday (and is still sick today), and Peter couldn't come because he had to go to work. John was the only one who came. Since Peter didn't know that Sarah had got sick, after the party he asked John if he and Sarah had enjoyed the party. John replied:
I did, but Sarah couldn’t come because she's got sick.
Is it correct to use the present perfect "she's got sick" after the past tense "couldn't come" if the speaker wants to emphasise that Sarah is still sick at present? Thanks.