Don't worry about the quick "o" - happens to me all the time. I can still have a really intense o again after that. The quick one is almost reflexive. So...as far as strategy is concerned I would let her have the quick one and then back "waaaaaaaaaaaaaay" off and tease her until she gets revved up again. Just back off the genitals and start over with the kissing, the breast etc... The next one will probably take longer and be much more intense. At least that is how it works for me. Sometimes my most intense o's have been after several less intense ones and me thinking that I couldn't possibly have another one left in me.
