Zaid Alsalami, Shaykh Dr Zaid Alsalami is an Iraqi born scholar, raised in Australia. He obtained a BA from Al-Mustafa University, Qom, and an MA from the Islamic College in London. He also obtained a PhD from... Answered 3 months ago

Bismihi ta'ala

Your late wife must have been a good lady for you to continue to remember her. Yes, of course you can do dua and pray for her forgiveness, as long as she was not hostile to Islam and she knew no better. 

With prayers for your success.