My man cummed in my mouth without permission

So last night I went down on my man before he went off to sleep he loves when I do this and we were both too tired for sex so I was sucking him off and I told him to tell me when he's going to cum so I could let him do it all on my boobs he didn't say anything and he ended up cumming all in my mouth and holding on to my head whilst doing so. I really was confused but I didn't wanna spoil his orgasm so I allowed him to finish as most his cum was already in my mouth and his moaning was getting me really wet...but after I got up to spit it out and laid down again I felt a feeling of I don't even know but it didn't feel good I jus didn't like how I'd made it so clear to him not to cum in my mouth n he just went ahead and did it anyway.

It's really upsetting me I mean am I overreacting? Why would he cum in my mouth even though I asked not to? Do I mention it or is it okay because he's my man?