Us Weekly also reports that Hudson, 30 -- who has been front and center at his baseball games since they began dating this past spring -- has been bragging to pals about what a good lover Rodriguez is.
"They love sex!" a pal tells Us Weekly of the pair who began dating in May. "They talk about it all day. Kate gets graphic talking about his body, even to her parents."
For more on their steamy romance - including how Hudson says they'll be together "forever," their plans for a 2010 move-in and whether wedding bells are in their future - pick up the new Us Weekly today!