she was hugging Jack and Janet she never asked about Chrissy. They could have atleast written that into the script even if Chrissy was no longer on the show.

You would think that the roper's would be curious as to what happend to chrissy, and why her cousin was there instead. I always thought it was strange too.

Maybe they talked on the phone or visited when the show wasn't on. I always thought it was strange that they didn't live far from each other and never visited.

Maybe Mr.Roper didn't want to waist gas in his car to drive 8 miles