Ashlee Simpson filed for divorce from Fall Out Boy singer Pete Wentz on February 9th citing "irreconcilable differences" - she's also seeking joint legal custody and primary physical custody of son Bronx - but X17 got these exclusive photos of the family together for lunch just a few hours ago, perhaps in honor of Valentine's Day?

Ashlee and Pete lunched at The Beverly Hills Hotel's Polo Lounge, arriving around 12:30 and left just an hour later in the same car. Seems like they've already got amicable co-parenting down pat!

So despite the fact that two separate reports claim Ash was partying hard before the split announcement AND that the "Bittersweet World" singer is moving in with big sister Jessica, it appears that she and Pete are still on speaking terms and keeping things cordial.

Various sources say the split is amicable, claiming Ashlee was simply tired of Pete's busy touring schedule. Could the couple be heading toward a reconciliation?

Take a look through our gallery and decide for yourself...