Blitz get a theraband from the PT folks...its just a stretchy rubber band thingy.
Lay on the bed on your back, bend knees, feet flat on the bed, knees together.
Place the theraband under both knees and then tie it over the top of your thighs right before your knee cap...tie it nice and snug.
Now relax and let both knees fall to the bed outward (where your inner ankles end up touching each other), bring back together, and fall back out. As you get stronger you can help by using your muscles and moving the legs toward the bed.
Each color of a theraband is different which tells the PT person how much the therband will stretch. Some you have to use more muscle to make it stretch. So you want the easiest theraband first, then the next, then the next, so you can use more muscle as you get stronger.
When you get stronger, you can stand on the floor, tie the theraband right above your knees (legs together), then going sideways take a wide step...keep taking wide steps (until you run out of space in your house), then switch to the other side and take a wide step, back together, wide step, back together, and so forth, like walking like a crab.
Then after a couple of weeks, try the "machine" again....you should see a difference if you've done the above 2 x a day.
Good luck