A Houston couple was shocked to learn last year they were going to have two sets of identical twins -- at once! The four babies, born on Valentine's Day, are not quadruplets.

This is extremely rare, and the couple says they did not use fertility drugs.

Parents Tressa and Manuel Montalvo already have a 2-year-old, and now he has four baby brothers.

This story from HLN affiliate KTRK is already pretty cute, but it gets cuter: The new baby boys are named Ace, Blaine, Cash and Dylan. A, B, C & D!