I agree with Scarlet on the lifting thing Dream. DS is far too big for being carried in any sort of contraption (also just over 2 and a half stones like Scarlet's) but I worry a bit about carrying him.
About once a day at the moment he has some sort of melt down (very tiring - he doesn't normally bother with temper tantrums
) and then does that whole 'floppy' thing where he won't put his feet down and it is sooooooo heavy to hold him up, and I'm getting more and more cross telling him to put his feet down (grrrrrrr). Not so bad at home but if he does it when we're out its a real pain if you can't just put him down as he is an absolute dead weight. And I do find it makes my tummy hurt / ache.
For a while now I've been cutting down carrying him because he is just too heavy so it isn't a sudden change for him for me to say I can't carry him. But I do occasionally pick him up and it does make me ache.
Anyway, that's a lot of rambling to say I am sure it won't make much difference - as you say Scarlet when we're at home on our own with them you have no choice, but if DH (or indeed any other able person
) I'll get them to help out.
Oh, and I'm afraid I have the opposite boobage problem. At the moment my boobs are a modest H cup 
. To be fair I'm not exactly my slimmest (ahem). I put on half a stone on holiday just before getting pg so never quite managed to shift it and since getting pg I've put on another half a stone so I am now about a stone heavier than I was at the start of June. Can't understand how I've put on so much since getting pg as it seemed to all go on at once and nothing since I reckon it must all be my boobs!
That's what I told the m/w anyway....
Even when I was 5'7", size 10 slimmest I've ever been, I still had an E cup. I'm still 5'7" obviously but sadly not a size 10, or a size 12, or even a size 14 now...... I hate it - they are a pain in the arse and almost impossible to shop for (bra wise). And as for nursing bras - gah! Last time I had to have some horrible NCT ones which were the only ones I could find to fit :(
I am really going to get in shape after this baby is all sorted and bf and see if I can't get those boobs down to some sort of commercial size :)