You said she invited you. I guess I'd want to know if you sensed that she meant it, or whether she did it begrudgingly. If it was a sincere invite, I see no reason to snub her, I'd go. But expect nothing, and don't read anything into it, and don't look at it as an opportunity for anything. As long as you don't crowd her and talk about anything other than hockey, you'll still be giving her space. Should just be a relaxing family outing, nothing more.