Victoria I read your other thread with interest. I have always been pretty scared at the idea of giving birth, but strangely feel quite calm now it's a not-too-distant reality! (Which is bound to change nearer the time).
I was doing a bit of research last week and read on a site somewhere that slightly more than 50% of births are VB and therefore slightly under that are CS, so it is far from a given that CS will be something you're railroaded into. And of those CS, only about 3-4% (from memory) are in cases where the first twin was delivered vaginally and the second by CS. So I take it that even if the second is breech at the start there is a lot that can be done to get it to present head down when the time comes.
In my hospital (St George's in Tooting) there seems to be quite an assumption that you will do things naturally (which I don't take to mean without anaesthesia!) So I guess it probably varies a lot by hospital and it's worth getting a discussion going when you see the m/w.
I thought it was encouraging on the other thread that so many women said whatever the experience ends up being, it doesn't really matter to you afterwards - I know there are some who have an awful, traumatic time and others who get very distressed if their plan doesn't work out, but I do think if you go into it with an understanding that things might need to change with a moment's notice and you need to be ready to go along with it then the second of these is at least avoidable.
As for sisters, I would reserve judgement about what's going on with her because you never know what things are like for other people. I struggled for 2.5 years to get pregnant (ours are IVF babies) and people around me were having babies every 5 minutes, getting lucky the first month of trying or by accident, and it is very, very hard to deal with when you have troubles of that kind. Your sister may or may not be trying for a baby, but it sounds as though people have all had expectations that she'd be first out of the two of you and she may have taken that to heart. Hopefully if she's only been married a few months then she's not mired in a long and painful TTC slog like I was, but I would just bear in mind that she might be and it can be really hard to hear other people's happy news even if in many ways you are pleased for them. Being pleased for them doesn't mean you aren't sad for you, IYSWIM.
On a change of note, I'm wearing my new maternity trousers today for the first time and the comfort is bliss! Just yesterday I came to the conclusion that I was going to have to find another coat to wear as mine was really cutting in and suddenly wearing normal trousers unbuttoned isn't at all comfy either. This week has seemed to bring quite a lot of growth - so tomorrow is going to be a day of shopping to get me a few more things. I hate dragging anyone with me clothes shopping (it really makes me feel limited and I never take enough time over it) so I will have to find something else for my husband to do while I browse.
Oh, and as for sex we haven't had any since I can't remember when, some time during our IVF cycle I think! The fear of miscarriage up to 12 weeks was putting me off but we haven't even broached the subject recently, which I think we should - as someone said, this is basically the window of opportunity when it's physically possible and we haven't even considered whether we want to! So that's another one for this weekend...
Have a good one everyone.