Or HaChaim on Genesis 30:17/אור החיים על בראשית ל׳:י״ז

1 וישמע אלוקים, G'd heard, etc. This means that Leah prayed to G'd first.

2It may also mean that G'd had understood the reasons for Leah's behaviour. She was motivated by her love for G'd and her desire to fulfil His commandments. If, in the process, she had committed an error of etiquette, G'd on His part did the same by allocating to her more than the four sons originally intended. The other two sons were in recognition of Leah's pure motives.