She wanted to visit extended family as well (they live near O'Hare on the Blue Line) so it's for our convenience. I found that the Comfort Suites in Schiller Park has what we need (we'll just take the hotel shuttle to the airport and grab the blue line there), so unless I find something better, that's probably what we're going to book. The reviews for the place aren't bad either.
(I also found that the Best Western Plus Airport South also has the jacuzzi, but they charge more for what appears to be a vastly inferior room, and the reviews aren't good at all)