Don't feel upto it sometimes..Is this ok?

Hi ladies,

I have a question..or rather an observation. Only when I wear sexy clothes before sex, do i get aroused. If I am at home in my pyjamas, after all the household work, if my DH wants to have sex, I simply don't feel upto it or even get too aroused. My hubby sometimes expects a quickie and at these times I just dont feel upto it if the mood is not set and for me what i am wearing is a part of setting the right mood.
Is this how it works for most women? Just curious, so asking.

Fiona