I still think Sam is uncertain of Dean's acceptance, after he came back from hell with no idea how it happened. The more time they spend together, the more confidence Sam feels, and the more he'll be able to trust Dean with his feelings - and eventually he'll be able to talk about his experience with Lucifer in the cage.

I have a couple of cavils with continuity in this episode - Lisa says Ben was in his room for 'hours' after Dean yelled at him - surely she wouldn't have let it go for hours! And after the incident with the shape-shifter in the store, somehow Sam got all their purchases into the car, the baby strapped in and the car to the front door in the time it took Dean to run to the door? And then Sam suggests the shape-shifter had followed him from the baby's house - why didn't it attack while he was waiting for Dean, or while he was waiting for Dean to come back??? I know, LA LA LA...I just wish they didn't poke at my willing suspension of disbelief! (It doesn't bother me that Dean didn't cite his experience changing Sammy's diapers because, hey, he was only five at the time....it's been a few years there!)

In spite of all that, I'm very happy with all the great stuff in this one - Lisa seriously rocks, Dean was definitely hoping to improve on his self-perceived failings in raising Sam and chagrined (at least!) when he recognized the way he might be turning into his own father in spite of his best intentions... And I'm really looking forward to seeing Castiel again (finally!!) next week!