President Trump said Monday in the Oval Office that his wife Melania was compelled to write a letter to Russian President Vladimir Putin because she “felt strongly” about wanting to see the war end and “loves children.

In a show of spousal diplomacy, Ukrainian President Volodymyr Zelensky on Monday delivered a letter written by his wife, First Lady Olena Zelenska, to U.S. First Lady Melania Trump to express gratitude for her appeal to protect the children of Ukraine.

In a letter posted online by President Trump, the first lady wrote to Russia’s leader of the “duty” to safeguard children, but didn’t mention Ukraine.