Family friend, Liz Gaffney said the family were thankful for the judgment but "this will never bring Sonia back".
She warned others to be much more vigilant online.
"A special word of warning to everyone using social media sites, we urge you to please read cautious and be aware," she said.
"It is so easy to set up false profiles, Sonia made an error of judgement and paid for this with her life.
"We would also like to thank the jury for the unanimous timely decision and for seeing her murderer as the lying, manipulative person that he is.
"For this our family is so grateful.
"Sonia was an innocent, beautiful, kind, caring person and mother who is sadly missed by all of us who knew her and loved her," she added.