Just the robe with nothing on underneath, just straight nude? like this...

or
Wearing something underneath the robe, like a nightgown/chemise or bra/panties or stockings/pantyhose? or anything really, like this...

For me I love it when a woman opens a satin robe and she is wearing something underneath especially when the robe hides the goodies underneath. But sometimes I do love when the robe is shorter then the nightgown she is wearing so you can see the nightgown with the robe closed.
end of transmission...
Roda SaTiN Stein