Though Pete Wentz was recently spotted having a low-key lunch with estranged wife Ashlee Simpson, the rocker keeps his focus on his mane man, son Bronx Mowgli, 2, while stepping out in L.A. on Monday.
Wentz, 31, filed a divorce response Tuesday in which he seeks joint custody of their little boy.
“There’s no fire. It’s a very straightforward response asking for joint custody and fair distribution of attorney’s fees,” a source tells PEOPLE. “He’s not gearing up for a custody war.”