Jeremy gave you an address, but when you go there --
-- you find that it's actually the apartment of her son Scott and his family. When you talk to Madison, Scott's wife, she tells you that Penelope is now in what's known as assisted living (or as Joey says, a nursing home), but she won't tell you where. This is a situation where Joey can help.
When you leave, Joey sticks his head through the door to listen; send him on in and see what you can find.
Go through the door at the right (next to the thermostat) to find Penelope's room. There's a brochure on the dresser for Seagram Assisted Living, which will now be on your map.
When you go there, you'll see a receptionist. Happily, this isn't like the newspaper office; they're delighted when people come to visit.
Talk to the receptionist to find that Penelope spends most of her time in the common room on the second floor. Use the elevator to get there.