I just spent the past hour talking to a first cousin I never knew existed. I only heard of most of her siblings through contact on Facebook. Their mother is the aunt who raised me from 0-4 years old but she never brings up her kids when we talk, only her eldest son who I've been in contact with for years. I have also have nieces and nephews I've never heard of and it's embarrassing asking them who they are when they track me down because they love me yet I don't know who they are. We have a big family and it's so hard to know who everyone is.