She will be able to request a Priority Pass membership which will be entirely separate from yours. She will be able to bring guests to lounges, but the number of guests is set by the lounge. American Express will pay for two guests, but the lounge is not required to admit two.
In which country is your American Express card issued? Did you ask about a membership for an additional cardholder, or about bringing guests into a lounge?
Canada. I was asking about membership.