If you are trying to keep her all to yourself then spend the extra money and buy her a Sybian. Had the wonderful experience of being loaned one for a summer. The wife and any one else that would try it out would be difficult to get off the machine. It works best for women. The cock moves in way a real cock just can not. It also vibrate at an adjustable rate. Easy to you with a remote cable control for her or you to use. It never stops and will keep her occupied for hours. Just do not expect her to be able to do you afterwards. She will be very spent for some time. It makes for a very happy lady. If she will use it many times a week you will be able to get anything else you want from her. It is pricey but well built and will last a very long time. Guys have tried it in their ass but it just does not do the same thing. They make an amazing tool your you to. Again pricey but worth it. Go for it!

Here's my recommendation! Use and abuse it!