This is interesting. I got a record from familysearch, maybe its the same one. I see here that she uses this Frucina again (or they hear it that way) missing the first part of the name.
On her brothers (Peter) death certificate, and a few fam. members, a record from social security states: her his parents are Theodore Sperski Male Spouse Mary Boosch (later that does prove to be her maiden name) Child Peter Sperski. It's odd, about half the children state as above on the marriage (some say Vincent) or Wicenty/Wienti, the other half says Thaddeus, Theodore, same last name, also on a ship for her sister Stanislawa, she says she is with her bro Mikel and father, Theodore, both were detained and deported. I could see if the mother remarried, but if she did it might have been a brother, because clearly it says on many records Wienti, Wicenty, Vincent Sperski. Thank you.