WHERE IS JENNY'S GRAVE?

I went to the Grizzles to do meet up with Flaco, I never went to Sadie's ranch after the first mission. So I decided to make that detour into Sadie's ranch. I found only one thing there which was a medical box. Nothing special in it. I thought to then take a look at Jenny and Mac's grave, but I didn't find it there. At all! I over heard Dutch and Hoesea talk about sending someone sensable to bury them at the ranch. I didn't find it.