Mumtaz Sattar, 38, died in mysterious circumstances 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 drinking spiked tea in a robbery on a taxi journey from Lahore Airport on Saturday morning. She was buried 14 hours later.
Mr Sattar, 45, of Penilee, Glasgow, said he was poisoned but survived. His passport and cash were stolen, he said.
Police in Glasgow helping Pakistan colleagues are 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 the 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 into these matters."
Solicitor Aamer Anwar has appealed to First Minister Alex Salmond and Punjab Governor Mohammed Sarwar - the former Glasgow MP and Labour kingpin - to intervene.
Family members are concerned that Mr Sattar is now trying to obtain travel documents to leave Pakistan.
Yesterday, Mr Anwar wrote to police in Lahore with questions the family have, including why Mr Sattar had chosen to take a taxi from outside the perimeter of the heavily guarded Lahore Airport with, according to his own account, two strangers.
He also raised concerns that Mr Sattar has applied to the British High Commission for emergency travel documents to leave the country.
He wrote: "Scottish police are investigating the circumstances and may hold important information as to what happened.
"We are concerned Abdul Sattar has applied to the British High Commission for emergency travel documents to leave the country.
"He is at this stage not arrested or accused of any crime. One would assume he would want to assist the police with their inquiries to apprehend the killers of his wife."
Mr Sattar's brother, Abdul Ghaffar, yesterday described a frantic phone call he received from his brother describing the robbery.
"He said they'd been robbed and Mumtaz was hurt. He sounded drowsy, like somebody drunk. It was like he had lost his mind."
The attack allegedly took place when the couple's taxi stopped on the road from Lahore to Faisalabad, where the couple were heading to visit Mr Sattar's parents.