My fiance and I have decided not to invite young children to our wedding. His brother has been with a woman for over two years, and she has two teenage sons (18 years old) who we plan on inviting. When sending out the invitation, we were thinking of adding "and family" to their invite. The only problem is when we get married they will also have a 1 1/2 year old daughter together who we do not want at the wedding. How should we make out the invitation to make this clear?