My DD is not invited to SIL's children birthday parties - is it unreasonable to expect them to include her. Especially when they are activities that everyone is able to participate. I assumed that was something families did - and I know they've invited other cousins in previous years before we had a child, but those ones are older now so they have less party type events however there is two years between youngest niece and my DD (mine bring younger). The age gap difference between them before was three years so I'd assumed she'd be included. Just wondering what's normal or expected really