VERSE 51:

GOVINDĀNAṄGA RĀJĪVE BHĀNU ŚRĪR VĀṚṢABHĀNAVĪ
KṚṢṆA HṚT KUMUDOLLĀSE SUDHĀKARA KARA STHITIḤ

As the daughter of Vṛṣabhānu, She is the beautiful sun that shines on the lotus flower of Govinda’s erotic desire, and She is the ambrosial moon that casts its rays on the Kṛṣṇa-lily and thus delights it.

Stavāmṛta Kaṇā Vyākhyā:

In the following couple of verses Śrīpāda Raghunātha glorifies Śrī Rādhā’s beauty and sweetness within Śrī Kṛṣṇa’s pastimes.

The sunrays help the lotus flowers to blossom, and as soon as the lotus of Govinda’s erotic absorption sees Śrī Bhānunandinī it starts blossoming.
Here we must understand the meaning of the word anaṅga.
Śrī Kṛṣṇa is not an ordinary lover, He is the non-dual ocean of transcendental bliss, and only love can arouse desires within His heart. This subjugation by His devotees’ love is one of the great qualities of His love for them The desires that premamayī Rādhā,
the embodiment of the amorous mādana mahā bhāva, causes in Him are called anaṅga, and His anaṅga-lotus blooms as soon as the sun of Vāṛṣabhānavi starts to shine.

As soon as Govinda sees Her, He becomes eager to accept Her loving service.

Śrī Rādhārāṇī is like the moonlight that shines on the lily of Kṛṣṇa’s heart, delighting it and causing it to blossom.
Just as the lilies automatically open and bloom as soon as the moon rises,
Kṛṣṇa’s heart starts to blossom as soon as He hears He simply sees Śrīmatī or hears Her name.

That’s why He tells Her:

khene khene mukha tuli, ghana ḍāki rādhā buli,
tabe prāṇa hoy nivārana
tomā anusāre āsi, kuñjera bhitore bosi,
tomā lāgi ei vṛndāvana

“I lift My head and loudly cry out “Hā Rādhe!” to stay alive.
I follow You and sit down in a grove, for You I am here in Vṛndāvana!”