Ashlee Simpson spent yesterday afternoon with her mom, Tina, and young son Bronx in LA. The starlet is apparently certain about going ahead with her divorce from husband Pete Wentz despite their hanging out repeatedly over the weekend. Pete rose early in the morning to chat on Ryan Seacrest's radio show, debuting his new music and chatting about his split from Ashlee. He said, "It's like Ashlee's been my best friend for five years. She's the mother of my child. I have nothing but love and respect for her. Going through something like this isn't easy, but we're friends, and the most important thing is to put our son first." Pete's actually putting some distance between himself and his ongoing breakup, as he and his band the Black Cards are joining Travis McCoy on tour later this week.