Vertical Lunge Bent L

Hey guys.  Just started all 3 stretch series this week, along with foundation.  I have tried the Vertical Lunge Bent L (PT called it the couch stretch) but I lack mobility to even get into this one properly. 

The knee of my front leg wants to go to the side so that front hip can open up.  I really have a hard time with any movement that involves bringing knees to chest.  How should I scale this stretch?  Also how can I work more on that knee to chest pattern?

Move the knee further from the wall and or place the foot on top of the couch.

1 hour ago, Mark Collins said:

Move the knee further from the wall and or place the foot on top of the couch.

The back knee away from the wall?

Yes.