Are these two betrothed?!

Chloe Green, 26, and hot felon Jeremy Meeks, 33, are still going strong ... so strong, in fact, we think they may be engaged!

We spotted Chloe with a HUGE rock on her ring finger Friday, as she and Jeremy shopped the day away in Beverly Hills. At one point, they met up with a mystery dude who appeared to sign the bill for a new Celine bag. Chloe had already made a stop for some sexy lingerie at Agent Provocateur; Meeks and Green then headed to a toy store ... to pick up some gifts for his son Jeremy, most likely.

Theirs would certainly be one of the most extravagant, over-the-top, crazy weddings the world has seen -- we ex-cons be on the guest list?