It's bad to ask people to lie for you.
Becca has been seeing someone outside of the relationship with her romantic partner.
Becca wants to have an excuse if he starts asking around.
Becca makes up her own excuse and simply asks her friends not to say anything at all.
Becca asks her friends to tell her partner a made up story.
Becca's friends are relieved that they can stay out of it.
Becca's friends feel obligated to tell the partner a story that isn't true.