Third scene: The POV is looking for a place to hide on the battlefield and finds Katty's dead body lying face up. He lies down beneath her so that their heads are on opposite sides, with his feet more or less on or around his "bulge." After a few moments of playing dead, you start "playing" with his feet, rubbing them against the bulge (with his sandals on), then a minute later you take them off and play a little more. Finally, you get up and kick the corpse a bit before leaving, taking his weapon with you.
Fourth Scene: The POV approaches Katty from behind as she shoots the enemy, unaware of their presence. Then, using the rifle, you choke her until she falls face down and dies. After that, you pull down her pants, creating the illusion that she's being raped (I'll leave this to your interpretation). Then, the POV spanks her, removes her sandals and the rifle, and leaves.