Paul uses a rhetorical question to challenge what some people think about him and Barnabas. Alternate translation: "We certainly have the right ... Cephas." (See: [[rc://en/ta/man/jit/figs-rquestion]])
# a sister wife
"a wife who is a Christian sister" or "a believing wife." The word "sister" here is a nominal adjective. (See: [[rc://en/ta/man/jit/figs-nominaladj]])