What two important events in Cleveland's personal life occurred while he served as POTUS?

Grover Cleveland got married in 1886 during his first term as president. He also developed cancer during his second term as present and secretly had a tumor in his mouth removed in 1893.

Explanation:

Grover Cleveland was president of the United States from 1885-1889 and 1893-1897. He is the only person to serve as United States president in two non-consecutive terms. When he assumed office for the first time in 1885 he was a bachelor, although he had a son with Maria Croft Halpin. He married Frances Folsom, who was the daughter of his best friend and 27 years younger than him. In 1893 President Cleveland began seeking medical treatment for a tumor that had grown in his hard palate. He had an operation to remove the tumor while in office but in secret aboard a yacht called Oneida that was owned by a friend. He told the press it was dental work to try to avoid public knowledge that it was cancer.