Released - Is This Normal?

It might sound like a strange question after reading about “Edging,” but here goes… Background: My wife and I have only been experimenting with chastity for about a week, and for us it’s mainly me managing masturbation while she gets peace of mind knowing I’m doing well. Wednesday: The wife took the key to work… When she returned home we went to bed for some affection time. For some reason, I couldn’t cum? I was right on the edge multiple times—once holding it there for several minutes—but just couldn’t seem to ejaculate. No trouble staying erect at all… actually quite the opposite… Is this normal?!