decoying
The fine social con of bringing a person as your date to an event such as a wedding to give the impression you are in a serious relationship when you are not.
Example:
As he was merely decoying, primarily for the benefit of his ex, he made sure to add to the impression by not being able to keep his lips and hands off his stunning partner throughout the evening.
As he was merely decoying, primarily for the benefit of his ex, he made sure to add to the impression by not being able to keep his lips and hands off his stunning partner throughout the evening.