Mary has already agreed to bear Jesus. She gave birth to him over 2,000 years ago. Nearly 2,000 years ago Jesus died on the cross and rose again 3 days later. All of this has happened. He has redeemed us. The words "save us" are saying that Mary, right now, can save us. She participated with God in our salvation, but she didn't save us, nor can she save us, which is what the cross is asking her to do; the cross that only means anything to us because her Son, our Lord, died on it to save us.
on a personal note, I would not like having a cross like that
ask your Mother in Law what that cross means to her, you said she is not really a deep theological thinker, ok, but she still choose that cross for some reason, ask her the reason
I think you might be reading too deeply into what might be nothing more then simple devotion to the Blessed Virgin Mary
this is a VERY simple symbol, a cross and three words, there is not a lot of context given
is this talking about eternal salvation? or to for being saved from a particular event?
is it talking about Mary saving someone of her own volition? it is it about the intersession of Mary to her Son our Lord Jesus Christ?
is the name of Mary over the cross to imply that her sufferings were united with the suffering of her Son on the cross?
I do not know, because I do not know who made that icon so I can not judge their intent, and it is so simplistic, it does not really say much
like I said, not my cup of tea, it looks too much like worship of a human being and lacks any qualifiers that might lead to a better understanding of the matter
https://encrypted-tbn0.gstatic.com/...AdWkjN9EK1mWJbBD69BQTqzz6CgKIjZu3L-tJylnaUkf1
Immaculate Heart of Mary pray for us now and at the hour of our death amen