Judge, David Radford warned Mary Konye that she will face jail when he sentences her on March 7:
I should make clear that, in my judgment, this is a case that will, in all likelihood, need a substantial custodial sentence. It is inevitable, but it won't be dealt with until I have received those reports.
Victim, Naomi Oni burst into tears as she left the courtroom and was hugged by family and friends.
More top news
A 24-year-old man has been arrested on suspicion of murder after the body washed up on the Thames shoreline.
Seven people have now been arrested after a man died from serious head injuries
The 38-year-old officer was on his way home from a night shift when he collapsed. His death is not being treated as suspicious.