I think that there is a thin line between peoples fantasy and what they will actually do. She doesn't mind doing all the things you listed for you because she feels a connection with you like no one else. She wants to make you happy, but she wants you to be happy with just her, and her with just you. Virgins are tricky people, they like to fantasize but most will never act them out fully. After 10 years of marriage I'm not surprised that she will do almost anything to turn you on (as long as it is just the 2 of you), but she is in the monogomy mindset and it will take a while to get her to open up. Few ideas.
Be patient with her, you don't want her to do this before she is ready.
Try and introduce cuckolding porn into your forplay sessions, after you watch it together and u tell her what makes you hot it may help a little.
Instead of trying to get her to just jump right into the sack with another man, go out with her and have her mingle and flirt while you watch from a distance. This way it is like baby stepping into the idea. If she likes the attention she may open up more.
You didn't say anything about your dick size so I don't know if you are small, but if so then ask her about what she thinks a bigger one would feel like. Could get her thinking dirty about others more.
Introduce dildos and other toys into your sex life, you can roleplay and watch while she fucks herself with "another cock" than yours. You could even act out a "clean-up" from the imaginary creampie. This will help her to think of other cocks and see what it is like to have you submit and worship her.
Last, have her take control of you for a weekend and let her do whatever she wants with you. You can be like her slave and her your Mistress. You may be surprised at what things she would like for you to do.
Hope this helps.