A man has been charged with the murder of pregnant young mother found stabbed to death in her home in Rochdale.
Police have said they had charged Siraj Arif, 31 with the murder of Ms Khatoon, who on Wednesday was described as the "best mum in the world" by her family.
The 31-year-old man, of Armstrong Hurst Close, Smallbridge, Rochdale, will appear at Bury Magistrates' Court on Thursday.
Mother Saiba Khatoon, 26, had excitedly told friends she was delighted to be expecting her second child, before being found fatally injured in her house in Kirkholt, Rochdale, just before midnight on Monday.
Locals have said Ms Khatoon, believed to have been a care worker, was a happy and friendly young mother.
Officers were called to the scene in Darlington Road by paramedics who had been alerted after the woman's eight-year-old son ran to a neighbour's house to raise the alarm.
On Wednesday the victim's family released a tribute to her in a statement issued through police.
Saiba's family said: "Saiba Khatoon was born in the Rochdale area on May 9 1985. She was one of eight children and has lived in the Rochdale area all her life. She attended local school and college before being employed as a community support worker helping vulnerable adults and children with various disabilities.
"Saiba married in 2003 and her son was born in 2005. She was always smiling, was a very happy person and loved practising her faith. She was pregnant with her second child and was looking forward to becoming a mother again. She planned to name her baby after her sister who had passed away from illness some six years earlier.
"Saiba is much loved and will always be remembered by her friends and family. We have lost the best mum in the world, the best daughter, sister and friend a person could ever have.
"She was one of the kindest people you would ever wish to know and always went out of her way to help others. She did not deserve to die in such terrible circumstances.
"The world was a better place with you in it and we will miss you terribly. Until we meet again, my mother, my daughter, my sister, my friend, rest in peace."
Chief Inspector Mark Bell, of Greater Manchester Police's Rochdale division, said: "A young woman has tragically been killed and we have officers supporting her loved ones at this difficult time.
"I want to reassure the community that a team of detectives have been working tirelessly throughout the night and have acted quickly to make an arrest.
"We are very much in the early stages of this investigation but if anyone has any information that could help us I would urge them to get in touch.
"This incident will undoubtedly cause some concern in the local community and there will be extra officers in and around the area today. If any residents want to raise any concerns or pass on information I would encourage them to come and talk to us."
Anyone with information is asked to call police on 101 or Crimestoppers, anonymously, on 0800 555 111.