Stay in your lane, which means that you wait for the next time she lets you inseminate her within that 1 minute flat she has come to accept as your trade mark.
Don’t worry, breast milk is very healthy and good for children of both ages. The female nipple is arranged in such a way that it generates special antibacterial grease so the bacteria didn’t enter the child’s body. Nothing bad will happen to them. bur really it is big harm for the female body, she loses a lot of trace elements that are necessary for her health, calcium, iron, etc. I think you must start introducing complementary foods into the nutrition that are suitable for your children especially because the first one is old enough to be weaned.