Alejo shows them his (-or- their) new room. At that moment the phone rings and Elisa seizes the opportunity to leave:
-Hi, can I speak to Alejo?
-Yes, just a minute he'll be right here. (=ponerse al teléfono - to get on the phone)
She covers the receiver with her hand and says loudly:
Alejo, can you mind the phone for me?
Ramon tells Elsa, smiling.
-I understand, answers Juan, resigned.