Hi again
Although it would be normal for her to be listed under her maiden surname on the MIs, I checked both surnames but she is not listed.
It might be that you could consult the Kirk Sessions Minutes for the period. There might be a mention but it's only an outside chance.
Sorry

Gadget
Added - do you know where she was born. It might be that there is some reference to her on a family gravestone in another parish.
I see from the 1851 census that she was b. Troqueer - I'll check there but it is only an outside possibility.