In his song "White Wine in the Sun", Tim Minchin sings
I'll be seeing ... my grand and my Mum.
This apparently stands for grandparents, but what is the 'default' visualization of that word by native speakers? Do you see multiple grandparents or, for instance, one grandmother?
For me as a non-native English speaker, the latter seems more natural, since, along the musical motion and harmony change, the scene's attention is somewhat focusing gradually on the Mum character, going from plural of sisters to singular of Mum, dragging the intermediate point to singular.
It could also be undefined, so that you'd only sense just a vague odor of grandparenting. Is this the case?