It's not easy dealing with a Monster-in-law. Just ask Jennifer Lopez! Dealing with particular in-laws means always having to walk a fine line between pleasing them and standing up for yourself. This becomes all too real on family gatherings and vacations. Suddenly, you're forced to be with them all the time and to cater to their needs, wishes, and fluctuating moods. This Redditor has been preparing for an upcoming trip after learning that their mother-in-law was made aware of private informatio…