A man discovered the newborn baby he was grieving for had never even existed after he and his friends dug up the tiny white coffin.
After fooling her family into believing she had delivered the infants, she feigned the death of one of them and staged a burial, it is alleged.
Farewell
She claimed she had left the other twin being cared for in hospital. Distraught family and friends took turns to carry the 'deceased twin's' coffin before bidding an emotional farewell to them.
But the next day, Melvin's pals reportedly began to doubt Rosa's story and decided to return to the graveyard to dig up the coffin with him.
When they did, they found a plastic doll dressed up as a baby inside.
Ultrasound
It is claimed Rosa had kept up the charade of being pregnant for the whole nine months, convincing friends and relatives she was expecting.
She even announced she was expecting twins after an 'ultrasound scan'.
It is reported that her actions were a bizarre attempt to keep her 'wayward' partner by her side, although this has not been confirmed.