The wife and I are beginning to experiment with various types of anal play, but we haven't progressed to the stage of her fucking me in the ass with a strap-on...yet. I know she'd love it.
I would check out something that stimulates her as well, while she stimulates you. Nexus makes a great double-dildo that can be worn with a harness that's received great reviews. Check it out
here.
If you don't want to bother with a harness you could also try the
Feeldoe, which I've heard can be worn worn without a harness.
Have fun.
