The pair were both found guilty of a charge of assaulting her and two charges of raping her, after denying the charges.
Drummond was jailed for seven years for his part in the rapes, whilst Stewart was sentenced to four and a half years.
Both brothers will remain on the sex offenders' register indefinitely.
Two brothers who held down and raped a 19-year-old girl who they met through the dating website Badoo are jailed for a total of 11 years.
A judge told the brothers at the High Court in Edinburgh: “Together you subjected the complainer to an appalling series of sexual assaults.” Lady Carmichael pointed out that Drummond had initially ordered Stewart to hold the victim down and issued further orders to him during the continuing assaults.Drummond, 23, a prisoner, and Stewart, of High Street, Invergordon, had denied assaulting and raping her during an earlier trial at the High Court in Edinburgh.They were both found guilty of a charge of assaulting her and two charges of raping her.Police said he met and befriended the girls and their families at the church in Withington, Manchester and gained their trust.The abuse would begin as hugging and ‘playful wrestling’ but then escalated into sexual abuse.