Hmm. Very difficult situation, and unfortunately as with any problem there are always two sides. To make the decision to donate to a family member is an emotional and sensitive offering to someone close to you and/or family who desperately needed someone's help. That you offered shows what a kind and generous spirit you are, and that 'family' plays a very important part in you life.
That it didn't work out according to plan, is terrible. Who are any of us to judge the reaction of a 23yr old? How many of us can truly say, that at that age - we made lasting decisions that will last and affect us for a lifetime? To be confronted with one's DNA and biology, I can only imagine - must be confronting.
It is true that it sounds like some of these issues are yours to deal with personally, and with your husband - and not the responsiblity of your sister in-law. That your sister-inlaw hasn't been open with you and your husband about continuing plans is a reflection of her, and not you. Should she not purse her family because you (unfortunately) no long feel happy about your donation and the outcome? I believe, that she has a right to do as she wishes with her eggs as they were donated to her. Should she, in the spirit in which they were given - ask you how you feel about this? Do you have any feelings/emotions to share about her using the eggs? I believe also, yes she should have. I think that technological, medical advances are not always in line with our emotional growth as people. Bad people do not donate to sister inlaws who are infertile. Bad people also do not use eggs that are given to them to have families. We are all human, and we all have to do what is right for us. Seems to me, with baby nu 2 on the way, you need to work out what is best for you and your husband, and not concern yourself with what is best for them. Good luck.