"Splash" of cream in my coffee

I’m confused about what is a “splash” of cream in my coffee. I’m using whipping cream, but I measured my “splash” and it’s about an 1/8th of a cup. Doesn’t that throw me out of IF? If I have the coffee with the fat, I find that I can go longer with my fasting window but I met with a friend who has lost 60 lbs through IF and she said nothing in your coffee, just black, if I want to do IF correctly. Help!