@Anurag Maurya
I do actually. "A complicated first love" on webtoon does have a muscle mommy although not the sole focus (its about 3 love stories at the same time and well 1 of em is a muscle mommy Ig). Second one would be "Being Targeted by Hyena-chan" should count? Not sure but FML is big and has muscles.
not sure if A Story "About Treating a Female Knight, Who Has Never Been Treated as a Woman, as a Woman" counts haven't read it far but she had muscles but might not classify as mommy and more like as a girl with muscles
