looks like a 1903 springfield or a german 98 mauser. (i' just waking up, so eyes are a little blurry). the engraving looks as though it was homemade or added by an engraver many moons ago, which killed the collecting value of it.
however a very nice looking piece of history in either case.
if i were you, make sure it was safe to shoot, and since she wants it gone, offer $125 - $150 for it. (should be a fair price for the rifle as mentioned before the engraving pretty much killed the value).