WSC,
Great job!! You're already doing the most important part of sex-education which is making sure that your grandkids have access to the information they need to protect themselves and a place where they know they can talk to someone, find support, and get the answers to any questions that they may have.
Having your grandkids log-in to the forum is a great idea. This is a great place where your grandkids can feel comfortable asking any questions and can get all the facts and information they need to stay safe...but remember, though we may have more factual knowledge on the subject than you, it's also really important that your grandkids know that you are always there for them too and that they can come to you with any questions or problems they may have. Having open communication with your teens is the best thing you can do to keep them safe!
It sounds like you're doing an incredible job and hopefully we'll be able to help you AND your grandkids BOTH get the support and answers you need as the teenage years roll on