I'm a wife and a mom. I had two C-sections too. I know your pain. Our baby slept in our bed until she was 8 months old, so finding "alone time" was almost impossible.
One thing we would do, since we both worked after #2 was born, was have an afternoon that we both took off work early and headed home to have sex. No questions asked, no changing plans. Leave at 3:30, meet at 3:45-4. At 5 go get kids from sitter. It was great for us because we knew that at least once a week we were going to have time for each other. As the kids got older (youngest is 3) we've been able to make more time for each other.
Some things you should do:
1. Forget about the 20 pounds. Buy clothes that you like to wear. You had two kids. You can try, but those 20 lbs may or may not ever come back off. It's not worth stressing over how you look in your OLD clothes. Buy stuff that makes you feel sexy (empire waisted shirts, straight leg jeans, accentuate the best parts of you and kind of hide the rest).
2. Exercise. I thought it was a myth, but exercise increases your sex drive and doing something that makes you feel good, makes you feel better about yourself.
3. Take some time for masturbation. For women, frequent blood flow to the vagina (caused by orgasms) also increases sex drive. Even if you don't orgasm, taking the time to make your body feel good, makes you want to let him make your body feel good.
4. Don't stay in sweats/pj's all day. Take the time every day to shower, get dressed, and do your hair. It may take a little time out of your day from chores, but it's well worth how you feel afterward.
5. Find a babysitter. Do you have a friend that you talk to about very personal matters? Is your mom close by? Explain that you need 1-2 hours every week to focus on your husband and intimacy. They'll understand and be so happy to help.
6. Try to make sure your conversations don't ALL revolve around the children. It's hard sometimes since it's such a major part of your day, but try and talk about the things you used to before children.
7. Find something you can do for an hour or two a week that is all about YOU. Both of you should have a hobby or a form of relaxation that just revolves around yourself. For me, it's some crafting stuff. For him it's video games. Taking the time to do the things you love gives you something to come back together and a) talk about, b) not feel like you're only about your kids and wifely-ness.
These are just some ideas. Obviously, not all of this is something you can do every day, but some of it is and it's well worth the time. Once your husband sees you doing what you can to make yourself look/feel good, he'll be eager to spend the extra time with you.
Hope this helps!