Tell them. Just have a crazy prego hormone freakout. Throw a fit and yell and cry and tell them to stfu lmao that's what I would do. There's only so much pushing someone can take and only so many times you can politely say no before you blow up. Seriously.
I agree with lilsea and afterwards apologize and say its your hormones Lol.
Apologize but let them know you meant it lol
I would lie to them and say you are or have been doing those things.. And the oil thing is a horrible idea. It can give you diarrhea and horrible cramps in your bowels, and it doesn't guarantee the starting of labor.. And if it does start labor, you'll spend most of it on or near the toilet (sorry for tmi, lol).
Good luck with your bf's family. It's horrible to have to deal with people like that.
Just tell them.your doctor said not to do any of that lol let it be obvious that your annoyed