When the inspector arrived, the two witnesses agreed to stay mum about what they had seen.

The ballet mum cheered loudly from the front row as her daughter took her solo bow.

After a long week, the wine mum sat on the porch and savored a glass while watching the sunset.

When asked about the missing documents, she chose to keep mum, fearing that any comment might make the situation worse.

Mum's the word about the surprise party for Jenny — keep it to yourself until the big day.

My mum-in-law surprised everyone by bringing a homemade cake to the family picnic.

Everyone at the tea party kept asking for advice as if she were the unofficial queen mum of the neighborhood.

After struggling to save for years, they finally bought a house with help from the bank of mum and dad.

The gymslip mums cheered loudly from the sidelines during the school sports day.

At the parent-teacher meeting, a group of tiger mums criticized the school's relaxed homework policy.