伯母は

as for one's aunt

→ 伯母
phrase Rare #32,529
as for one's aunt 伯母 specifically refers to an aunt who is older than one's parent. は marks the aunt as the topic of the sentence.
JA: 伯母は料理がとても上手です。
EN: My aunt is a very good cook.

私の伯母は書類を読むときにメガネをかけます。

My aunt wears glasses when she reads documents.

伯母はどうした

What happened to your aunt?

— Sanjuro (1962)

彼女の伯母は一日中彼の犬の世話をする。

Her aunt takes care of his dog all day.

伯母は僕を…我らの友ヒープをどう思う?

What does Aunt think of me... and our friend Heap?

— どん底作家の人生に幸あれ! (2019)