Melanie, I went through the same thing when I was pregnant with Imran. I even had a GP tell me that I would have to wean. I've never been back LOL.
Imran is only 4 months old but MIL is already beginning to ask about how long it is until I stop and trying to hint that I should be starting solids. She almost had a heart attack when DH told her that I was planning to BF Imran until he was 2.