I too was very upset that homegirl sat down on the bed with Terry up to her neck in covers. I would've had to scoot her off the bed with my foot or something. That was just unacceptable. We're grown, get out!
I'm glad that Lem didn't give in, but I honestly want to see him and Bird get a divorce. She has issues and is not even trying to get over them.
Max is just a little emotional and doesn't always think first. I don't think her initial feelings were completely jealousy, but some sincere concern in there as well. She probably just wishes her sister paid her more attention and took some lessons from her in mothering and wifey 101.