[circlecity]

"Based on what source? According to Clement of Alexandria, tradition holds that St. Peter's wife was martyred prior to his crucifixion."

Based on Eusebius who reports that Peter's wife was martyred in Rome with Peter shortly before Peter's crucifiction. So, Clement appears to reporting the same thing.

[A.A. Cunningham]

Therefore, based on sources outside of Scripture, Peter became a widower before his death.