You can only use the Walkthrough mod or Incest patch. I'm not into the incest thing so I don't merge the Incest patch into my mod"
It's pretty easy to integrate the mod into the incest patch.
But I can see that the patch does not include and take into account some subsequent changes to the script.
I will include the mod to the patch,
BUT then you will play with an "outdated" script.
The changes are not major (mainly corrections of typos), but I don't have the time or inclination to completely revise the Incestpatch.
So here is the combined walkthrough mod with an integrated patch.
Have fun.