Mila Kunis  and Ashton Kutcher  are no strangers to showing off PDA , but on a date night on Wednesday, they weren't hugging each other. After having dinner in LA, Mila was seen hugging Ashton's Two and a Half Men costar Jon Cryer while Ashton embraced Jon's wife, Lisa Joyner. Mila will be spending even more time with Jon when she guest stars on their show later this season . However, her character, Vivian, will have a much more complicated relationship with Ashton's character, Walden, than their real-life romance. Though the two feel an "instant connection" and Walden is convinced she's "the one," he's about to propose to someone else. But hey, Mila and Ashton do complicated well — remember Jackie and Kelso's roller-coaster relationship  on That '70s Show?