Stacey linked to Suki through Eve (and also Kheerat more tenuously), to Denise through Jack, to Sharon through Kat being married to Phil, Sharon’s ex and baby daddy.
Kathy linked to Sharon via Phil who is both their ex husband, and linked to Denise through Phil as they both have children by Phil, also linked to Linda via Ian as Ian, her son, is married to Linda’s soon to be stepfather’s ex wife. Also linked to Suki via Nish, who in a way enabled her husband Rocky to con her twice - first by gambling away their honeymoon (the gambling on the stag do was Nish’s suggestion and was what set off Rocky’s gambling spiral) and then buying off the cafe for the predatory loan).
Suki linked to Stacey and Kathy as above (Suki and Kathy teamed up before to help Kathy win her honeymoon back), also to Denise via Ravi (both are witnesses to Ravi’s murder of Ranveer), to Linda through Nish’s attempted purchase of the pub.
Denise is linked to Stacey and Suki as above and to Sharon and Kathy through Phil (the three of them are mothers to Phil’s children). You could also say she is linked to Linda through her husband Jack who is brother to Linda’s baby daddy Max.
Linda is linked to Sharon as they are best friends, she is also linked to Kathy as above as Kathy’s son Ian is married to Cindy, her mother Elaine’s partner/soon to be husband George’s ex wife. She’s linked to
Suki as Suki and Nish tried to buy the pub and she gazumped them by bringing in her mum as a buyer, and her mum then made an enemy of Nish. Her daughter Annie’s biological father is Max Branning - Max is brother to Jack Branning, Denise’s husband, which links Linda with Denise. Linda and Stacey have both had flings with Max so this links them both, loosely.
Sharon is linked to Linda as above (best friends), also Kathy and Denise (share a baby daddy) and Stacey (whose cousin Kat is married to Phil, Sharon’s ex husband and baby daddy). Sharon also crossed swords with the Panesars over the acquisition of the pub, so you could say she’s linked to Suki in this way, although it’s stretching it somewhat as she didn’t have much to do with Suki over this.