President Joe Biden on Friday for the first time publicly acknowledged his seventh grandchild, a 4-year-old girl fathered by his son Hunter with an Arkansas woman, Lunden Roberts, in 2018.

“Our son Hunter and Navy’s mother, Lunden, are working together to foster a relationship that is in the best interests of their daughter, preserving her privacy as much as possible going forward,” Biden said in a statement. It was his first acknowledgement of the child.

“This is not a political issue, it’s a family matter,” he said. “Jill and I only want what is best for all of our grandchildren, including Navy.”

Hunter Biden’s paternity was established by DNA testing after Roberts sued for child support, and the two parties recently resolved outstanding child support issues. The president’s son wrote about his encounter with Roberts in his 2021 memoir, saying it came while he was deep in addiction to alcohol and drugs, including crack cocaine.