Nobody is ever going to think you have forgotten Ianto. From never having met you, and only having peeked at your blog, it is abundantly clear to even this doe-eyed bimbo that you will not ever live a day without rmembering him. So don't worry about that.

It does not matter a skerrick what your aunties think of you. If their opinions are anything less than glowing, they're not worth worrying about anyway.

mrsmac makes an awesome point - if Ianto were earthside, you probably wouldn't mention him on the invite. Baby shower invites are hard enough to word without putting siblings in! On the plus side, you have ooooodles of time to think about it and get it right.