dans son café

in his coffee

→ dans
phrase Rare #33,657
in his coffee Here, “son” agrees with the masculine noun “café,” so it can refer to coffee belonging to or associated with a male person. In context, it may also be translated as “in their coffee” depending on the situation.
FR: Je mets toujours un peu de lait dans son café.
EN: I always put a little milk in his coffee.

Mary a mis du sucre dans son café.

Mary put sugar in her coffee.

Il mit du lait dans son café.

He put milk in his coffee.

Il a un peu de lait dans son café.

He has a little milk in his coffee.

Tom a mis du lait d'avoine dans son café.

Tom put oat milk in his coffee.

Tom met rarement du sucre dans son café.

Tom rarely puts sugar in his coffee.

Tom n'a qu'un nuage de lait dans son café.

Tom only has a splash of milk in his coffee.

Il met rarement du sucre dans son café.

He rarely puts sugar in his coffee.

Tom a mis du lait dans son café.

Tom put milk in his coffee.