Originally Posted by RetroMusicFan:
“Weird! I don't recall any other 'Rebeccas' in the show apart from Becca, Stacey's friend and are the Harris's related to Mo? Not sure i've heard of them. Isn't Jean a Slater, related to Charlie?”
There are two Jean's. I posted a thread on here a few months ago and we came to the conclusion that Stacey was initially intended to be Mo's grandaughter via Jean, but they must have bailed at the last minute and decided that they wanted Stacey to be a Slater. That meant something of a retcon where Stacey became the granddaughter of the Aunt (Violet) that Kat stayed with when she was pregnant with Zoe. Given Sean's date of birth (Christmas 1983,) she, Charlie and Viv would have been running the risk that Jean and Brian would have showed up with a newborn Sean, while they were hiding a pregnant 13/14 year old in the house.
Aunt Jean (Mo's daughter) was last mentioned in July 2004 when Lynne left. Stacey arrived in November of that year.
Joanne is Mo's granddaughter from one of her other kids. She was mentioned a few times in 2002. Little Mo went to stay with her to help her out when she was ill. No one else offered as she only had glandular fever. Joanne and her unspecified family sent a sympathy card when Harry died, so it's possible that Big Mo has a few more great-grandchildren somewhere too.
Most of the Big Mo / Pat history was explored in this
http://m.youtube.com/watch?v=aw4xkpqzGA0