Well it's difficult to say something being out of the context. As you describe it your husband seems to behave quite strangely, it's not normal such behaviour just out of the blue!

Your husband may have an age crisis but there may be more than you think and maybe not so negative. I'm a man and I can tell you that sex it is a big deal. Your husband may need it way more than you and he may have been satisfying himself alone to compensate, maybe with online porn. Don't get scared, nothing of bad in that, it's just to relax the stressed, for a man porn can be a turn on simply for the idea of sex, not because he really like those scary girls in there.
Anyway a man knows perfectly that it's not very healthy to jerk off in front of porn, at least from a moral point of view. So maybe he changed his mind and thought "why am I touching myself with this stuff when I have my wife who I like and I can do way better?", so he started coming into you being a bit more "sticky". Again, I consider this a good thing, he wants you to take full part in his sexual life and not to have just a role in it. So instead of being more romantic (what is probably what a woman would need to be turned on) he started behaving like a man would do: sharing frankly what he has in mind, and that is sex! He of course expect you to be glad of that, he wants you! But you got embarrassed of that and stepped back. Trust me that is something that can really break a man eventually. Not because of the lack of sex (because it's not the case) but because he sincerely expect you to get turned on and have amazing sex. By refusing him you make a damage and his energy is transformed into anger. He doesn't do it on purpose trust him, this can be proved by the fact that he tries over and over.

Long story short I think you should have great sex with him and stop worrying, by having sex he will calm down in a good way. But be careful, sex is not just penetration, if you go like "ok let's have sex" he will sense that you are doing it just for him and what you get it's only that he calm down till the day after because you really didn't switch off that flame inside him.

If you have an issue with sex than you should face the fact that you also have a problem. If not then just relax and go wild, the dirtier the better, don't be ashamed, sweat is just gonna help. By a dildo to use together, maybe even a strap-on, you may reveal parts of him you didn't know and he is just gonna love you more, even if he refuses it he will be amazed by you.

He is giving you the chance to become his dream, just go for it.