The Wrong Blue Eyes by B.B. Reid

Heat up the holidays with this new forbidden romance from the bestselling author of Fear Me and Lilac.
Noelle is far from a good girl. In fact, she can be downright bad.
Everyone she meets adores her wild antics. Well, everyone except for her boyfriend.
When Paxton suggests a trip to Aspen for the weekend, Noelle decides to find that missing spark.
But what Noelle thinks is a romantic getaway turns out to be a party for four.
If two’s company and three’s a crowd, what do you call a sexy fourth wheel with blue eyes and a killer smile?
Answer: Your boyfriend’s twin brother.

The Wrong Blue Eyes is a novella and a complete standalone.