He told how his sibling suffered more than 90 injuries, including being stabbed in the liver, spleen, lungs and heart with a four-and-a-half inch knife.
He said: "I used to check up on her all the time, I was incredibly protective."One day when I was taking her over some shopping, I noticed she was looking brighter, and she told me she'd met someone online."She showed me their messages to one another and I was horrified.They were very sexual and he'd even sent her pictures of his privates."I feared he was just after one thing, and told her as much.Stephen begged his sister to end the relationship but she continued seeing him.Then his worst nightmare came true when he read on a local news website that "A 39-year-old woman has been found dead in her flat."He said: "I felt sick to my stomach.Scammers take advantage of people looking for romantic partners, often via dating websites, apps or social media by pretending to be prospective companions.
They play on emotional triggers to get you to provide money, gifts or personal details.
The 33-year-old was jailed for a minimum of 17-and-a-half years after he admitted murder in July last year.
Liverpool Crown Court was told Hawke, of no fixed abode, moved into Sharon's house after just one date, and started controlling the 39-year-old, who suffered from depression and had learning difficulties.
I called the police who told me the news, Sharon was dead."I knew immediately who had killed her.
We were eventually told Kevin Hawke had called the police after killing my sister, and had been charged with her murder."As we waited for the trial I planned Sharon's funeral.
He is appealing for women in violent relationships to seek help, and be cautious when online dating.