The laughter wasn't for Loki's sake, but Astrid's. She was generally a happy child, and she was determined to make sure that continued. As she watched Loki hug his daughter, she tried to stay hard against him, but she couldn't help but soften a little as Astrid hugged him tightly, then broke away and looked up at Natasha.
Kneeling down as well, she tugged her close and kissed her forehead. "Go inside, little one. I'll be in soon to fix you dinner." After she ran off, the Russian slowly looked over at the demigod, meeting his eyes.