Last night I brought my wife, who is the same age as myself, to multiple orgasms following a period of time when these were proving more difficult to achieve.
She prefers clitoral masturbation by one or more fingers. I vary the speed and pressure, sometimes using just the tip of one finger lightly, sometimes using one or two fingers pressing harder. The motion can be across, up and down, diagonally or circling. I usually start slowly and work up the speed gradually. My wife will indicate her immediate needs my moving her hand over mine.
Last night her first orgasm came more quickly and powerfully after I put first one well lubed finger, then two, gently into her anal passage. It felt smooth and tight. Almost at once this delicious throbbing started with my fingers being gripped and released spasmodically. Her hips started to buck causing the anal muscles to pump up and down on my fingers.
The first of many powerful orgasms came with rapid anal throbbing and my hand being alternately pressed down hard and encouraged to continue rubbing and flicking the clitoris to successive heights of ecstacy. There must have been at least 60 orgasms in about 90 minutes. I think this experience will be repeated.