Hi Helen,
I'm sure you mean well...but going from an elderly King Cav to Old English sheepdog puppy, especially two of them, could be quite a shock, especially in size & attitude differences. Since your friend already has an OED, she's likely biased in favor of most EVERYONE sharing in her joy. They are wonderful dogs, but do require quite a bit of maintenance for exercise, hair, and training. They also has a very oddly loud bark.
Seriously, you might like to do some research on your own & find out the pluses & minuses of obtaining this breed. Would it suit your life & your family? I"m not saying it would or would not make a good companion, it just might be best if you checked out all of the angles and not just let your friend be your only outside opinion :)
good luck,
toodles