My best guess is that it is this one:
http://maps.google.com/maps?q=30.117062,+-98.299361&t=h&vps=2&jsv=173b&sll=30.116498,-98.299031&sspn=0.309097,0.512238&ie=UTF8&hl=en&geocode=FcaMywEdHxIk-g&split=0

Follow the link, click on Satellite view and then set the zoom to maximum and you can see the home.

Here's how I found it:

According to Zabbasearch, she (or at least someone with the exact same name and born in the same year) lives at:
8545 RANCH ROAD 1623
BLANCO, TX 78606
(see first source link below)

If you enter this address into Google Maps, it takes you to the highway very near a drive way (see second source link). With a bit of panning, you can clearly see the driveway in Street View. If you back out of Street view, pan along the drive way, you'll eventually end up at this house. I grabbed the latitude and longitude of the house from this map and used it to create the first link so that you could easily find the home.

According to Zillow, it was assessed at $129,460 last year and is a single family 2,070 square foot home on a 130,680 square foot lot.
(see third source link below)

Other free aerial image sites did not offer a better resolution image for this home.
Source(s):
http://www.zabasearch.com/maps/index.php?sname1=SHELLEY%20DUVALL&sname=...
http://maps.google.com/maps?hl=en&source=hp&q=8545+RANCH+ROAD+1623+...
http://www.zillow.com/homedetails/8545-Ranch-Road-1623-Blanco-TX-78606/8715...


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