Ben Affleck and his possibly-pregnant girlfriend Lindsay Shookus are taking their relationship to the next level! Lindsay brought her parents along to dinner Saturday night with her super-famous boyfriend ... is he preparing to ask for her hand in marriage???!!!

After his split from Jennifer Garner and his co-parenting duties of their three kids, Ben will have his hands full if Lindsay is, in fact pregnant. She brings a daughter Madeline to the relationship from her marriage to Kevin Miller. The Saturday Night Live producer, 38, seems to be taking steps to move to LA ... and Ben's purchase of a $20 million Pacific Palisades mansion certain squares with Lindsay's plans.

We spotted the group at to dinner at Cassia -- an Asian-fusion cuisine hotspot in Santa Monica. Madeline stayed home with a babysitter, presumably. The whole group went back to Ben's pad after and went hiking together this morning. This relationship certainly seems like the real deal!



So what's next for the couple? What do YOU think?