I wouldn't worry too much about it. It could have simply been something very subtle that she varied in her technique.
I know that when I am getting head from my wife that there is certain things she can do that can get me off very fast, for instance, when she goes farther down on the shaft and the head is further back in her mouth/throat, and when she goes at a slower pace. Conversely there are some things that just completely kill it but aren't necessarily uncomfortable or unenjoyable like when she is just working the head with her lips.
As far as the bullshit above about it meaning you're headed for impotency...ignore that.
At my age I still have hard-ons that point at the ceiling when I'm standing up and can blow a load very quickly under the right circumstances. In fact, I wish I had the issue when I was fucking that I do when I'm getting head.
I know that when I am getting head from my wife that there is certain things she can do that can get me off very fast, for instance, when she goes farther down on the shaft and the head is further back in her mouth/throat, and when she goes at a slower pace. Conversely there are some things that just completely kill it but aren't necessarily uncomfortable or unenjoyable like when she is just working the head with her lips.
As far as the bullshit above about it meaning you're headed for impotency...ignore that.
At my age I still have hard-ons that point at the ceiling when I'm standing up and can blow a load very quickly under the right circumstances. In fact, I wish I had the issue when I was fucking that I do when I'm getting head.