Simplify the following text for a Grade 9 native English-speaking person.
Original: Xenia and her first cousin once removed , Grand Duke Alexander Mikhailovich of Russia , her eventual husband , played together as friends in the 1880s .
Simplified: Xenia and her first cousin once removed , Grand Duke Alexander Mikhailovich of Russia , who would also be her husband , used to play together as friends in the 1880s . .