A Bronx woman was struck and killed last night when she walked out between two cars. The 28-year-old driver returned to the scene, and was taken into custody, authorities said.

Sonya Gayle Powell, 42, was mowed down in front of 4355 Baychester Ave. at 8:37 p.m. and pronounced dead at Jacobi Hospital.

“I saw this lady and her boyfriend try to cross the street when a car came out of nowhere and hit her,” said Dane Clarke, 18.

“The driver stopped the car down the block, put the car in reverse, and kept repeating, ‘Oh my God, oh my God.’ ”

Charges were pending early today.