Except for a sister relationship with Tepuianthaceae, little is known for sure about their relationships with the other families in the order.

Molecular results have consistently produced a sister relationship between the mountain beaver and the squirrels (family Sciuridae).

"We want the girls to have a big sister, little sister relationship," the project director, Pat Lanning, said.

Upon the merger of the two Chinese universities this sister relationship has continued on with Zhaoqing University.

However, the sister relationship of Disanthoideae and Hamamelidoideae has been well supported, although some researchers do not support this.

Myka has developed a big sister relationship with Claudia, which really began to mature in season 2.

Over the series they develop a older brother and younger sister relationship and they have a habit of messing around on the job together.

Bandung has sister relationships with a number of towns worldwide:

Finally, both parties agreed to begin a sister relationship.

"They've given each other a sister relationship."