Breast feeding for 2
That is amazing, God is providing you with enough breast
milk for your 2 kids.
It can be done if you can keep up with it, be careful, don't over do it, you have to take care of yourself, eat very healthy with plenty of proteins & drink enough fluids, you're eating for 3!, take your vitamins, your 17 mos old should suppliment with regular milk & solid food & start weaning . Good luck. Enjoy