Why would think she isn't having an orgasm? It sounds to me like she's having one--vagina contracting and clit being extra sensitive afterward. Why would you think she should be ejaculating? Don't be under the misguided notion that just because a woman doesn't ejaculate that she hasn't come. Does SHE say she is unhappy with what you are doing or unhappy with her orgasms? Or is this just your idea ("I want to make her happy!")? Don't pressure her or you may actually inhibit her ability to come because she can't relax and just enjoy her lovemaking with you. It sounds like you need to chill out a little and enjoy the "ride" more and put less emphasis on the "destination."

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Communication is the key.