Wiktionary
unwifely
a. Not wifely.
Usage examples of "unwifely".
Andrew has been brought to the limit of his patience by your attitude and unwifely behaviour and your lack of understanding with regard to his feelings as a father.
When he dragged her down, hauling on one of her wrists, she was trying maidenly to hold back, yet trying also not to put up an unwifely show of fight.
So that decent women should not be urged by their yearnings to unwifely resorts.