Gag problem... how to resolve this?

Honeylyn • Praying for a miracle to happen. Longing for a baby I can call my own...☺️
So, my husband always wanted to finish off into my mouth. Trouble is, I have a gag problem. I've managed to do it twice so far. Both times I had to run to the bathroom to gargle. My stomach bothers me so much. I want to please him but this "sensitive stomach" is definitely a problem for me. Any suggestions how to at least lessen this gag issue? 
Thanks 😍