A small-town mayor is under police investigation after finally giving his wife a nice, big rock.

Make that his ex-wife. And the rock was a 20 tonne boulder, not a ring.

Dany Larivière, the mayor of Saint-Théodore-d’Acton, east of Montreal, told a French news station that he had dropped the boulder off on his ex-wife’s lawn early Sunday morning. The rock is spray-painted “Happy Birthday, Isa XX” and topped with a big pink bow.

“I had to do something so she’d leave me alone,” he told TVA Monday morning. “That’s the biggest rock she’ll ever get in her life.”