1) Infidelity NounUnfaithfulness
The quality of being unfaithful.
She never engaged herself in any act of infidelity.
Quality - an essential and distinguishing attribute of something or someone.
Disloyalty - the quality of being disloyal.
Diabetic - someone who has diabetes; "He is a diabetic patient".
Today - the day that includes the present moment (as opposed to yesterday or tomorrow); "He is off work today".
Sister-In-Law - the sister of your spouse; "She is my sister-in-law".
Late - being or occurring at an advanced period of time or after a usual or expected time; "Faisal arrives late".