Is there any rule in Shastras for women to be kanyas even after marriage

Question

Manu Smriti Says

Sixteen (days and) nights (in each month), including four days which differ from the rest and are censured by the virtuous, (are called) the natural season of women. 3.46

But among these the first four, the eleventh and the thirteenth are (declared to be) forbidden; the remaining nights are recommended. 3.47

He who avoids women on the six forbidden nights and on eight others, is (equal in chastity to) a student, in whichever order he may live. 3.50

So it is possible for male grihastas to have innocence and chastity similar to that of Bramhacharis

Is it possible for women to have similar rules to posses chastity equal to that of a kanya(damsel) after marriage, to be specific marriage followed by loosing virginity.

Answer 1

Whatever conforms for men to observe the vow of Brahmacharya, the same applies (vice a versa) for women as well.

Bhishma said, ... As the sacred fire waits for libations to be poured upon it when the hour for Homa arrives, even so a woman, when her functional period is over, expects an act of congress with her husband. One that never approaches one's spouses at any other time save after the functional period, is said to observe the vow of Brahmacharya.
[Anusasana Parva]

It says that, like how the divine drink is offered to the deity of fire when the time of Homa arrives during Havana, similarly when woman's menstrual cycle is over, she expects sexual congress with her husband (subduing the fire). If a person (husband or wife) have such congress only during the prescribed period, then he/she is on the path of Brahmacharya.

A woman observing the Brahmacharya can certainly be considered as chaste, as equivalent as a damsel (kanya).