A.,
I live in Wellington and recommend it. All of Flower Mound is nice, but there's some folks that prefer one high-school over the other, though both Flower Mound High School and Marcus are excellent schools. Granted she has a few years to go before high-school, but that would be my consideration for where to live. Which would be south of 1171 and west of 2499. Which is where Wellington is...
I can tell you there's a house that's been on the market for a year in Wellington that is on the best street (mine of course!) that would be a good deal if the seller is negotiating now. It's a divorce situation, and he didn't even mow forever and day. But the house and the location are great. (Emerald Cove Drive).
Then there's a house for sale next to a friends in a older part of Flower Mound by the lake, but this house is brand new. It's an area where they're tearing down or remodeling some of the older homes... anyway, I saw the house being built and it's beautiful inside and out. It's on Moonlight Bay. Very different neighborhood than Wellington in that there are no sidewalks or pool or clubhouse, but it's still nice and the houses there go to the same schools, so they might get more for their money there.
I wish your friends luck and feel free to pm me.