Sylvester Stallone is raising some eyebrows with his latest post ... dropping old photos with his estranged wife Jennifer Flavin as they go through an ugly divorce.
Sly posted the pics Monday on IG -- the first one appears to be an old pic of Jennifer and him holding hands. In the second pic Sylvester, Jennifer and their 3 daughters are smiling and looking happy together as a family ... it's obvious it was taken many years ago.
He seemed to be taking a trip down memory lane .