Mary-Kate Olsen in NYC

Several people spotted Mary-Kate Olsen out on the town with sister Ashley on January 23. They spent the evening at Piano, an NYC hotpost.

“It was weird to see her and her pals there with a bodyguard in the corner keeping an eye on her. She didn’t look concerned with anything that had happened with Heath at all,” a source told Radar.

However, it wasn’t fun and games for the girls.“They didn’t laugh or smile a bit … not one bit,” another source said.

After Piano, Mary-Kate headed to Sweet Paradise with rumored boyfriend artist Nate Lowman and the two engaged in some PDA.

“It was a deep passionate kiss, which she’d follow up with a lot of little kisses,” says Radar’s source. “She seemed to be very into him. She kept putting her hands behind his head and playing with his hair.”

Thankfully, people left MK alone. “Most of the people just walked right by her and didn’t even pay her a second glance,” the source said. “She really fit in well here.”

Some people have been giving MK a hard time about these sightings. But I think people grieve in different ways and we can’t be ones to judge at this difficult time.

Thanks to jj for the tip!