Asma' (May Allah be pleased with her) reported:
A woman came to the Messenger of Allah ﷺ and said: "I have a co-wife. "Is there any harm for me if I give her the false impression of getting something from my husband which he has not in fact given me?" The Messenger of Allah ﷺ said, "The one who creates a false impression of receiving what one has not been given is like one who wears two garments of falsehood."

[Al-Bukhari and Muslim].

وعن أسماء رضي الله عنها أن امرأة قالت: يا رسول الله إن لي ضَّرة فهل علي جناح إن تشبعت من زوجي غير الذي يعطيني؟ فقال النبي ﷺ :
"المتشبع بما لم يعطَ كلابس ثوبي زور" ((متفق عليه)).