What is the smart and fashionable option for a long summer weekend, as guests of a rather traditional family, at their country house?

Casual Outfit 1:

White Linen Trousers
Ralph Lauren Polo Top
Flip Flops

Casual Outfit 2:

Summery Skirt
Plain V Neck Top
Ballet Pumps/Dolly Shoes

Night Outfit 1:

Long Boots with Skinny Jeans tucked in
Sailor Jacket

Night Outfit 2:

Black Dress which comes just above the knee
Black Fishnet Tights
Black Peeptoe Heels