Not sure what you are really wanting...

Color Curvature's Mixer script will (quite literally) combine M4 and V4 into a single figure. Here's how to do it.

Load M4. Load all his morphs.

Load V4. Load all her morphs.

Rename the V4 figure to "The Kids 4"

Run CC's script (found here.)

Ignore the complaints the script will give.

Delete the V4 figure.

If you have PP2014 Merge all Joints to Weightmaps... if not, let it be... it'll work anyway.

Locate the K4 morph now at the bottom of the parameters list.

Rotate it to get any amount of feminization you want for M4.

An additional advantage of doing it this way is, CC's script will fit your clothing to the hybrid figure at the click of a mouse.