*R&B singer Mario tells UsMagazine.com that he isn’t “allowed to comment” on his recent arrest for allegedly assaulting his mother, but wants to make one thing clear: “I love my mother very much.”

Mario, 24, was charged with second-degree assault Friday after his mother, Shawntia Hardaway, told police that she feared for her life after he shoved her, yelled at her and damaged property in their Baltimore apartment.

A source tells Us the fight allegedly broke out because of her lifelong battle with drugs. The source says Mario learned his mother had withdrawn money from his bank account to support her habit and also charged up his credit cards. When he got home, he found her “cracked out on drugs,” the source says.

Though he was taken into custody, the source says the singer did nothing wrong; he was only trying to help calm his mother down. The source suspects all charges will be dropped.

Says Mario, “I will continue to support her any way that I can.”