I am not sure what information you have on her, there is very little out there that is accessible. I did find this:
Sonia (Avakian) Sahagian, 82, of Auburn, passed away Sunday, October 7th, 2012 at the UMass Medical Center, University Campus, in Worcester after an extended illness.
Sonia was born in Chicago, the daughter of Michael and Seranoush (Tosoonian) Avakian. She was educated in Chicago schools and lived there for many years, working in advertising.
Sonia was a strong woman who was proud of her Armenian heritage. She was an ardent supporter of many Armenian causes, including the Armenian Heritage Park in Boston, the Armenian Milk Fund, the Armenian Assembly, and the Armenian Apostolic Church, to which she was a lifelong member.
She was a member of the Armenian Relief Society, the Worcester Foundation Auxiliary, the Order of the Eastern Star (Pakachoag Chapter), the Worcester Historical Society, and the Auburn Women's Club; she was also a charter member of the Armenian Renaissance Association and served on their National Executive Council. She volunteered at Hahnemann Hospital in Worcester for several years. Sonia enjoyed extensive world travel
If you can send a whole picture of the painting, I can value that for you.