(CNN) - A Southeast Texas mom and dad got a Valentine's Day gift they'll never forget.
The couple had two sets of identical twins at a Houston hospital. All of the quadruplets are boys and met their two-year-old big brother for the first time yesterday. The newborns were delivered via cesarean section at 32 weeks, weighing between two pounds 15 ounces and three pounds 15 ounces.
Manuel and Tressa Montalvo say they did not use any fertility treatments. Doctors say the babies are all progressing well.