I would say that you probably won't have to worry about the "NO sex beforehand" if you only wait until 2 weeks after being home. We tried, but it took like 9 months, at least, until she was really ready.

So, you have some time. But get some condoms just in case, wouldn't want to miss a chance, you know.

As far as understanding her resistance. We were constantly asked if we were having more, or just told "this is it for kids then right?" we always responded that we weren't sure.
My wife's thought process, which showed in her response, was that even though we had the three it was like only having one because they were triplets. Yeah, we did every thing three times, but all at once. While she didn't want to be having more very soon, she was thinking that she wanted a "second round."
I hope that helps you understand her side a little. For the record I'm with you.

FYI: they can "take care" of her while they are in there if she has a c-section. Just be sure to decide on that before labor starts.

G Donald
Father of girls AA, BB, and CC.
Blog & Pics: www.studio-forte.biz