fix inhale on /k/

by Kris
(New Jersey)

Hello everyone,
I am a newbie SLP and have a client that inhales, or "slurps in" as mom would say, on his /k/ and /g/ sounds, but mostly /k/. It is very hard to describe but No matter what I try, he consistently inhales on the /k/ in all positions of a word and in isolation. I have heard him say "I can't say that sound" and the mom did mention to me that dad yells at him to "stop talking like that", so I am starting to think that it may be that the child is trying so hard NOT to make the speech error to upset his father, that he ends up making this kind of error. Any therapy ideas or advice on this case? Thanks!