In TOW Mrs Bing, Joey says to Ross that his mother is also pretty,and adds-quote: "Do Ты thing it's easy giving birth to seven children?" But when he is at ужин with Mike and Phoebe he says that he has seven sisters. What do Ты think?
I know! Joey have 7 sisters, so she did give birth to 8 children! This is just a mistake from Matt`s side, and the writers! Weird they didnt notice! LOL!