"I don't want ds to feel weird or embarrassed by a completely natural process"
I was nursed until I was 4. Everyone knows this.
I was at my 20 year high school reunion, and the day after several of us met up at a friend's suite. I had my son with me, who was 3.5 at the time, and he kept asking for milk (I hadn't nursed him in public since he was probably 2.5, he was just too difficult about it, so this was not going to happen). One of my friends, who I only met in 8th grade (other friends there I had known since 2nd), said "oh yeah, Judy nursed you until you were 4, didn't she?" And she said it with a smile.
My half sister has a different mom, and she was nursed until she was almost 5, and is perfectly happy to tell people this. She still calls breasts the same word she came up with, which is "vahvies". Actually that's funny too, and well known...I called it "sip sip", not sure what my brother called it since he didn't talk much until he was 3, then my dad had the first half brother when I was 13 and taught brother "sip sip" but brother said somethign more like "ips ips". Second half brother born two years later, he called it "ippies". Then 10 years later sister comes along, makes it all new again with vahvies.
Anyway, everyone knows all about this. (the brothers ALL self-weaned at 2; only one had a sibling on the way, it just happened) There's nothing embarassing at all about it! Sure, there might have been a "moooooom" or two, but at a certain point, we're all embarrassed by everything our moms do...