"I want us to stay together until we are this old."
* "Quiero": I want
* "que sigamos juntas": that we continue together
* "hasta": until
* "seamos": we are
* "así de viejitas": this old
This is a very sweet and romantic phrase often used to express a strong desire for a long-lasting and loving relationship with someone. It implies a commitment to staying together through the ups and downs of life, even when both people are old.