I need to vent! MIL probs

Long story short! My husband friend has changed since he started dating this girl. My mother in law defends my husbands friend over her own son. So last night we were talking bout that friend, and saying how he didn't even congratulate us on the pregnancy.. and how he doesn't have anything to do with us..

And my mother in law said it's our fault because we didn't tell him we're excepting..

I told her he has nothing to do with us.

Then she goes, well if I was him and you didn't tell me.. I would tell you guys "fuck you and fuck your baby"

I was in complete utter shock and I'm so hurt by it.

I'm a shy person and it's hard for me to express myself.

What should I say? Or do?