traitoress
/ˈtreɪtoʊˌrɛs/Definitions
1. noun
A woman who betrays or deceives her partner or spouse.
“The media exposed the traitoress who was involved in the high-profile affair.”
2. noun
A woman who is disloyal or unfaithful, especially to her spouse or partner.
“The husband discovered his wife’s affair with a younger man and accused her of being a traitoress.”