Kevin Federline and Victoria Prince
04/05/2011 at 12:00 PM EDT
Check out that baby bump!
Dad-to-be Kevin Federline
poses with girlfriend
Victoria Prince as they show off her burgeoning belly.
The couple expect their first child
together – Federline's fifth – this summer.
The new addition will join siblings Jayden, 4½, and Preston, 5½, with ex-wife Britney Spears
; as well as Kaleb, 6½, and Kori, 8½, with ex-girlfriend