The 26-year-old singer was rumoured to have moved on after pictures emerged of her on a shopping trip with musician Craig Owens, who happens to be a long-term friend of Pete.
But an insider insisted that the friendship is purely platonic.
'Craig is a long time friend and was comforting Ashlee during this difficult time,' they explained. 'She's not moving on. There's no race for a new relationship. They're friends.'
The source added, 'Ashlee and Pete's split is amicable and they're working together to make this as positive a situation for [two-year-old son] Bronx as possible.
'Right now her attention is on Bronx and some new work projects she has coming up. That's it.'