I just had to respond too:
I have had three big babies and even bigger pregnancies! I measured 51 inches around this last time! The stretch marks began right at the end of my first pregnancy, and pretty much faded away afterwards. But with my second pregnancy, it was like a run in a stocking, and the stretch marks just rippled up and around my belly and sides. They were so pink after her birth, and I was feeling down about it. But one of my post-partum nurses was feeling my belly after birth, and as I bemoaned my new appearance, she said, "It looks just like the tree of life!" And it did, with three branches coming out of my belly button. And now I do have three kids, and still my (faded but wrinkled) tree of life. How could I want it any other way?!!! Her words totally changed how I thought about my stretch marks. They are part of me, just like my sweet babies are. And I wouldn't have it any other way.
Another thought: I've been working out at a gym since my last was born, and this awesome, fit, tiny trainer was helping me: she has 5 kids and lost all this weight after them and got totally fit. I was crying about how much weight I had to lose, and she said that you just have to have faith and work hard. But then she lifted up her shirt and showed me her shrivelled, saggy skin on her (slim) tummy. It's just there, and it ain't going anywhere. But she looked (and felt) great anyway. I found her honesty and encouragement utterly inspiring.
I hope that helps!!! Besides, I have a friend who did get a tummy tuck: they pulled down the skin and cut it off -- but guess what, they cut out her belly button, and made a new (fake) one. I don't know about you, but I love my goofy bellybutton, and it's my connection to my mother's womb. I would never want to lose that.
I hope that you can come to love (and tolerate) your mother body. Doesn't mean you don't do everything you can to improve it and keep it healthy (I do too), but isn't it amazing what we've done with our bodies? It's good to have a record of that!
H.