I wanted to say a few things after reading this.
First, for anyone to lay a hand on you and physically assault you, I would be afraid of them too. This to me is the line that was crossed (among others in your case) but to me this sticks out as a real valid fear of being in their presence.
Saying that, you know I fully support you and your feelings, but I will just list a few thoughts and Bible verses that may or may not pertain to your situation. I am listing them that they 'may' help or give you further thought if this is your situation, I am not saying it is, I don't know so I want to clarify that.
The first point that I wanted to make or ask about is "Does your husband fully forgive his family as Christ commands us to do"? Now I know this does not seem important, but really spiritually it is, for God's Word is clear:
Matthew 6:14-15
14 For
if you forgive men their trespasses, your Heavenly Father will also forgive you. 15
But if you do not forgive men their trespasses, neither will your Father forgive yours.
Mark 11:26
But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.
Matthew 5:44
But I tell you, love your enemies and pray for those who persecute you
Forgiveness is serious business so I would be sure your husband has done this. It sounds like you have already because you pray for them.
The other thought is I might answer one of the grandparents invites with some scripture. Maybe it will shed some light for her that what you really desire is an apology. Maybe that verse about if you have wronged your brother, go to that person and make things right before going to pray to God.
Matthew 5:21-26
(
Luke 12:57-59)
21Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment:
22But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.
23Therefore if thou bring thy gift to the altar, and there rememberest that thy brother hath ought against thee;
24Leave there thy gift before the altar, and go thy way; first be reconciled to thy brother, and then come and offer thy gift.
25Agree with thine adversary quickly, whiles thou art in the way with him; lest at any time the adversary deliver thee to the judge, and the judge deliver thee to the officer, and thou be cast into prison.
26Verily I say unto thee, Thou shalt by no means come out thence, till thou hast paid the uttermost farthing.
I would want to at least make that attempt, but again I am not telling you what to do. Since she is violent I would do it in a card or letter or something.
I hope you take these as food for thought. Might pertain, might not.
Be blessed. *hugs*