Nattergal and Havelle are at that age where they can't heed the warnings of their mother seriously. They've been warned about all the same things Nerferyt has, about sharks and rip tides, and big cats and big snakes, about other stallions that might do them harm, but they don't believe any of it would actually come to hurt them. Such things are the stuff of fairy tails. Their mother would surely swoop in before any real danger befell them. The most frightening thing to them at this point is whatever punishment their mother might serve in response to their bold rule breaking. They only smile at Neferyt's exclamations about what could have happened to them.
Nattergal's efforts pay off as she catches up to Neferyt and tags her in earnest. He laughs and comes to a sliding stop in the grass. His feet scramble for a moment as he finds purchase and takes off in the other direction.
Havelle is still bouncing and kicking up her heels when she realizes she's been targeted. She lets out a startled squeal and takes off running, but it's too late. Neferyt's established momentum overtakes her and lands a tag squarely on her flank. With a huff, Havelle circles back and goes after he brother.
She is in hot pursuit as he runs full tilt across the meadow. Nattergal blows a raspberry over his shoulder and in doing do, loses his balance. The colt tumbles head over heels. Not far behind him, and unable to stop, Havelle trips over her brother goes stumbling out of control. She runs smack into Neferyt's mom, grazing peacefully near their play area. She gets bounced backwards onto her haunch and finds herself sitting prone and looking sheepishly up at the strange mare. "I-I'm sorry!" she stammers.