How Did My Transactions Go to My Sister-in-law'@s's Email Account?

[Poghmahone420]

Three weeks ago, my wife received a copy of every transaction I ever made using PayPal via a cc cr9m her sister's email addreas. My quezrion is, how six PayPal's security protocol get beached?  I mean, I don't even have her as a friend on Facebook, much lezs include her for sharinv my transaction data.  Has caused a great deal of conzternation in my household whereby all my purchases are now being scrutinized.  

Has this happened to anyone else and or can anyone explain how this could have ocxurred in the first place?

[DPCreations]

First step would be to investigate security of your own devices and your own network.  Who has physical access to any devices you use for PayPal?  Is a password required to access any accounts?  Are accounts closed with logging off?  How are Facebook accounts securely segregated?