I have a phrase I LOVE to use in these situations. It is:
Now, why would you say that?
For example: She says: But I CANNOT believe you like your friend more than me?
You say (with total shock): Now, why would you say that?
She says: (nothing)
You say: Of course, I'm sure you understand how impolite it would be to leave a jet-lagged friend at the airport and waiting outside the apartment. Maybe DH's friend Bob can go to the concert with you?
The beauty of asking it as a question (instead of going on the defensive and trying to justify yourself) is that it takes quite a ballsy person to admit they are just trying to pressure you. And, it puts the onus on them. Of COURSE you're not that sort of person WHY would they ever say so?
