My Sister Is Pissed At Me

I'm pregnant with baby number eight. My sister has been trying for years with several miscarriages and failed rounds of

IVF

. Last time I told her I was pregnant she threw a lamp at me and it hit me in the head. Never really got an apology but I still tried to be understanding. I took your guys advice and just told her over the phone. She told me this. "Well don't come to Mom's birthday party"

I said "Why"

She said " I've got a bad temper and there are a lot of STAIRS there"

Then she hung up.... She pretty much threaten to push me down the stairs... I'm glad I didn't tell her in person..

Edit: I really don't want to make her seem like an awful person. I get she wants this so bad. She has a temper and I've had to learn to deal with her outburst.