Mumtaz Sattar, 38, died in mysterious circumstances at the weekend shortly after she and her husband Abdul arrived in Lahore to visit relatives.
Newsagent Mr Sattar said the mother-of-two lost her life after drink-ing spiked tea during a robbery when they stopped on their taxi trip from Lahore Air-port early on Saturday.
Mr Sattar, 45, said he too was poisoned but survived. His passport and cash were, however, stolen, he reported.
Police in Glasgow helping Pakistan colleagues with the case last night said they were making inquiries into claims Mrs Sattar had been involved in domestic incidents before she left Scotland.
Detective Chief Inspector Jim Kerr of Police Scotland's major investigation teams said: "Officers are continuing to assist Pakistan authorities in relation to the death of 38-year-old Mumtaz Sattar, from Glasgow.
"After our initial engagement with the family we have now received information around domestic incidents and inquiries are continuing."
Solicitor Aamer Anwar has taken up the case on behalf of Mrs Sattar's family. He has already appealed to First Minister Alex Salmond and Punjab Governor Mohammad Sarwar - the former Glasgow Labour MP - to intervene.
Family members are concerned Mr Sattar, who runs a newsagent's in Port Glasgow, is now trying to obtain travel documents to leave Pakistan.
The Sattars, from Penilee, in Glasgow have two daughters.
Mr Sattar is understood to have dual British/Pakistani citizenship.