My SIL and I get on fairly well.
Every year her family go on holiday in summer in Europe some, mostly SC.
This year she asked if she could borrow some summer clothes including shorts, dresses and bikinis.
AIBU in thinking that it is an odd request especially since she can afford a holiday and bikinis can be picked up for around £12 from supermarkets.
They both earn a decent wage, drive 2 cars and have a good home