Hypocritical.
insincere, liar, untrustworthy come to mind.
An insincere person should not be trusted
The word 'glib' means fluent but insincere.
An insincere apology is no better than no apology. I noticed that she was insincere when she said the shirt that was too small for me looked good.
Lip service
Some synonyms of the word "insincere" are ambidextrous, backhanded, and deceitful. Other synonyms include deceptive, devious, disingenuous, and dissembling.
Hypocritical or lacking honesty.
deceitful, deceptive, insincere
insincere
It can depending on the person and it also depends if you are the one being unfaithful/ insincere or if your spouse is.
another word for the qualities of a person is the traits of a person or the vitues of a person
An actor is a player, one who plays a part in a dramatic production. The word is used figuratively to mean a person who seems to be playing a role, seems insincere.