Ok I'm not at all surprised to not be invited to my sisters engagement party as she is a JW and I'm DF. I was telling my girlfriend about it and she was shocked that as a family member I wouldn't be involved. She already knows that as far as a wedding goes i'll probably be invited to the ceremony but not reception and that i'll be shunned at the kingdom hall, but I think the fact that the engagement is at my parents place she was so surprised that someone is so cut off from family things when in an unapproved status as per the WTS.
Like most people who have never been a witness, they don't realise how mental the whole thing is until they witness it. In fact i have been advised to go to the wedding by posters here to show unbelievers how they treat someone who decides to leave the borganisation.
CS 101