Deep feud reported between Kate Middleton and Meghan Markle.

A lip gloss borrowing incident highlighted their disconnect.

Incident occurred en route to Royal Foundation Forum, 2018.

Prince Harry details the event in his memoir, Spare.

Kate, reluctantly and taken aback, shared her lip gloss.

Meghan's application had Kate grimacing.

Media suspected the tension indicated ‘something bigger’ brewing.

Post-event, Kate remained 'on edge' and apprehensive.

Kate felt compared to and in competition with Meghan.