Well, technically it’s not appropriate in that the invite tells your guests who’s hosting (re: paying for) the wedding and your children are presumably not. For some people (admittedly sort of an older crowd), knowing who the hosts are is important because they like knowing who to thank and some even send little token hostess gifts. The big no-no is certainly DO NOT do this if someone other than you and your Fiance are paying for the wedding–if your or his parents or someone else are paying/contributing, then they should be acknowledged as hosts before your children–and in that case, I might even go so far as to say that your children shouldn’t even be on the invite, but rather acknowledged in the program instead. Remember that ultimately the invite is there to provide cold, hard, concrete information, such as who is hosting and who are the honorees–it is not so much to tell the world that you have children or how much you love them, kwim?
But if you are paying for the wedding yourselve and you’d like to do it, here are a couple brainstorm ideas:
“Michael, Kate, and Amanda Smith invite you to join them as their mother, JANE SMITH is joined in holy matrimony to Mr. JOHN DOE” or “Michael, Kate, and Amanda Smith request the honor of your presence at the marriage of their mother JANE SMITH to JOHN DOE” (you always use “request the honor/honour of your presence” if the ceremony is religious and in a religious setting; you use “pleasure of your company” if not)
“Please share in our joy as JANE SMITH and her children, Michael, Kate, and Amanda, are united as a family with JOHN DOE”
“We, JANE SMITH and JOHN DOE, along with Michael, Kate, and Amanda Smith, invite you to share in our beautiful beginnings as a family…”
“Together with their children, Michael, Kate, and Amanda, JANE SMITH & JOHN DOE request the honor of your presence…” (of course this is only if the children are yours and his, but I don’t think that’s the case…??)
“JANE SMITH and JOHN DOE, along with their children, Michael, Kate, and Amanda, invite you to share in the joining of their families…” (Ditto to above, although you could swap out “their children” and do “M,K, and A SMITH” to make it clearer)