Bit of an awkward situation.
I'm still close to 5 women I grew up with. 4 are married and we all socialise together, so they will all be coming as couples. 1 is very much single (and finding it hard, unfortunately).
The wedding will have tables of ten so it wouldn't be a problem for her to bring someone else if she wanted. She has other friends and is close to her sister, but I also don't want to embarrass her. wwyd?