Had a row with my Father about me continuing to bf my toddler twins last night

[Overrun]

I feel really pissed off with him, I have always known that he is not keen, but then so what, its not any of his business and we have never discussed it properly before now.
The two things that were said that got to me the most and that I would like feed back for are as follows:
He tried to jusify it by saying that he is worried about my health as I tend to be ill for most of the Autumn and Winter with Asthma made worse by viruses. Is it really true that bf 23 monthers will make me run down?
Also, when I cited the health benefits he retorted that my children are alwasy ill anyway so it is obviously not working. This was what really hurt, ds1 has Asthma and I stopped at 13 months with him, the twins also seem to lean that way, but they are a lot less severe than ds1. My argument was that who knows what they might have been like if I hadn't bf them.
Any support, information or reassurance would be gratefully received.

Thanks every one, it really is very kind of you all to respond like this. It really makes me feel stronger about it all, not that I ever wavered as such, but still its good to get the support.
I might just copy out kellymom website and give it to him, why not, I can't make him read it but he might

I had that list of what you reduce the risk of if you breastfeed for a day, a week, a month etc. and whenever anyone made a "haven't you been doing this long enough" comment I would say - "today I am reducing my risk of osteoporosis and ds's risk of bowel cancer."

He probably is worried about your health, but bringing you a nice warm casserole and helping you have a lie in from time to time would be a much better way of helping.

How you nourish your children is your business. Unfortunately you cannot change the opinion of some people (or even stop them expressing it inappropriately), but you can decide how you react. You have clearly stood your ground which I think is fantastic, now try not to let it bother you. I think what you're doing is brilliant. I bf just 1 baby until 9 months, if I had been able to stop him biting me I would have carried on longer!

Well done for breastfeeding this long i only managed about 3 weeks (hadn't found mn then).