I couldn't help my SO...

I'm a little embarrassed so that's why I'm posting without my name. My hubby and I have been together for 4 years. Occasionally he will have trouble finishing during sex. However when this happens I usually finish him off, either with my hand or orally. He has never has trouble reachingthe end when I pleasure him orally. However last night, he was having trouble finishing during sex so I started doing my thing orally but this time no matter what I did.. He wouldn't cum. He then played with himself and as he cummed placed my head on his penis. Was it wrong for me to feel a little upset that I couldn't actually help him finish? And to just feel like a cum dumpster as he basically just got himself off and I was there to catch the cum? I'm feeling so inadequate as a wife. I haven't spoken to him about it as its a touchy subject.