Rebecca used the phrase 'possession is 5/10's of the law'. As Gwen pointed out, the correct quotation is 'possession is 9/10's of the law'.
When asked by Fox for his legal opinion, Ethan stated that Theresa had every legal right to give away all the Crane money. This is incorrect. Alistair controls the majority of the Crane fortune. In addition, a wife does not have access to any of her husband's bank accounts if he hasn't placed her name on them. Theresa is spending money she doesn't have.
Theresa used the quote 'money is the root of all evil', which Rebecca correctly pointed out was a misquote. The correct quote can be found in 1 Timothy 6:10 as 'the love of money is the root of all evil' (King James Version).
Kay encourages John to 'be there' for Charity when Miguel breaks her heart. Although Kay knows that John isn't really Grace's son, John and everyone else believe that he is, which makes him Charity's first cousin.