This discrepancy in the objective is due to your priest’s deviation from the original purpose. However, by my own prowess I shall give you a good son.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
एतत्सङ्कल्पवैषम्यं होतुस्ते व्यभिचारतः । तथापि साधयिष्ये ते सुप्रजास्त्वं स्वतेजसा
etatsaṅkalpavaiṣamyaṃ hotuste vyabhicārataḥ | tathāpi sādhayiṣye te suprajāstvaṃ svatejasā
SB 9.1.20