I know this is a trivial question, but should I delete my ex wife from facebook?

Here is my history....

13 years together (10 years married)
2 children (now living overseas with the ex wife)

Separated for 13 months...soon to be divorced

She has moved on and seen many men, 3 months after the separation...so clearly not getting back together.

She does say she would like to remain friends....surprisingly we get along really well.

Facebook is great to see her pics of my kids as they live overseas, but I do not want to see her add her new 'friends' and see her posts.

What do you think?