Unexpected Ending

I've been my friend's on-call cocksucker.I'll get a call from him asking for a blowjob 2 or 3 times a day and I never refuse his request.
One day while we were riding around he pulled over to a secluded area and asked for a blowjob.
I gave him the longest blowjob I had ever given.Lots of teasing and edging.
After he came and I swallowed we were back on the road.
Out of the blue he said"You really do love sucking my cock,don't you?"
Before I could answer I let out the loudest and longest belch ever.
He laughed so loud.
I was so embarrassed.
The he said"I guess that means yes?"