I encountered the following statement: 

kulāṅganā hi caramaṃ śāyinyaḥ prathamaṃ prabodhinyaś ca bhavanti

and it was marked with an iti. 

(A variant wording has caramaśāyinyaḥ prathamāvabodhinyaś for caramaṃ śāyinyaḥ prathamaṃ prabodhinyaś.)

Unfortunately my grepping yielded no result, therefore if someone among you happens to know the source for this sentence or has a hunch of the type of source which could include a similar statement, I would be very grateful to hear from you. (I am thinking that dharmaśāstra might be the right place to search for it, but it would be nice to first narrow down the range of texts to examine.)

Beside that and regardless whether the above really is a verbatim quote or not, do any of you know more about the prescription/usage, in the ancient Indian context, that women, if they are respectable, wake up first and go to bed last?

All the best, 

Gaia Pintucci