I have found that the "refresh" time for my male companions is in opposite porportion to the amount of attention and foreplay I pay to him. Simply put; the less attention he recieves from me the longer it takes for him to "recover" his ability and desire to continue our activities. Don't get me wrong. Sometimes once is enough, more than enough. Its easy for me to recognize the signs of male satisfaction. Visually the shrunken, leaking penis combined with that self satisfied look of; well I got mine, I hope you got yours, tells me everything. The sound of snoring is also sure fire evidence that the evening is complete. Well, for someone it is anyway.
Now back to your situation. How does the thought of a little oral stimulation to your lady appeal to you? I know that really perks up my libido and even passes the time more quickly for me. I've also noticed that my guys penis gets remarkably functional after an oral sex session. Your a free thinking open minded kinda guy. You know she wants more of you and once your body starts cooperating you know damn good and well you will want more of her. So go for it. Begin slowly with minimal contact and slowly increase it all over her body not just her erorenous zones. After a short time you should both be fully aroused.
OK now. Test time. Have you begun to see a pattern here? Has it occurred to you that as her passion and desire increases so will yours and vice versa. Remember that first and foremost sex should be a giving situation. The more you give the more you'll get, usually.