Final answer:
Keira's action can be considered disloyal as she encourages the sellers to accept a slightly lesser offer from her brother's buyers.
Step-by-step explanation:
In this situation, Keira represents the sellers of a property while her brother represents interested buyers. Keira encourages the sellers to accept a slightly lesser offer because she believes those buyers are a "better fit" for the home. This action can be considered disloyal as Keira prioritizes the interests of her brother over obtaining the best possible offer for the sellers.