Masha is one half of fashion duo Anda + Masha.
It was first reported by Radar Online last month that Demi is in an 'intimate relationship' with a woman.
Radar also alleged that Demi has been helping to raise Masha’s daughter.
'They hold hands, and Demi is like a second mom to Masha's baby' a source told Radar.
Masha, who is one-half of fashion brand Anda & Masha and based in New York also has a five-year-old son.