What Happened to Cleopatra Selini?

Cleopatra Selini is married to Juba II and they are sent as husband and wife to rule over the client kingdom of Mauritania. I see this is a very smart calculating move of Augustus because here are two members of his household essentially who are thoroughly Romanised that are being sent to rule over what could otherwise be a problem at some point. At the same time while all of this is involved, do you want to weigh in, do you have a theory on what happened to her brothers who we never hear from at this point? It's probable that he fell victim to some kind of illness. The reading between the lines it seems like he died some point before the triumph in 29