I'm not sure if you've done this already(I think there was something where Clarice, or however her name is spelled, met Cecil), but did Bob introduce Clarice to the rest of his family? Does she know about Francesca and Gino? Do they get along?
He does at some point, but since they were childhood friends, Claryce had already met them in the past! Judith in particular had taken a liking to her the more she and Bob spent time together as kids.
But time has passed, and Claryce was still fairly nervous at the thought of meeting them again - funny enough, not because they helped Bob in his attempt to kill Bart, but because she sees them as such talented figures that she felt like she paled in comparison.
The truth is they still appreciate her (and are actually impressed with her growth). And as the conversation goes, she learns the Terwilligers hadn't the best relationship with her father - something she's not fully surprised of considering her own relationship with him, but knowing they're on the same page gives her some comfort.
However, she quickly figures out that, just the D'Amicos, the Terwilligers aren't afraid to get their hands dirty for the family's sake.
Don't worry for Harold tho (even if he's an asshole) - I want to give him the trope of being the character everyone hates but who, for some reason, can't get to die even when people try to backstab him. I think it's a fun dynamic.
The Terwilligers have their personal reasons to do so, family feud aside- but that's for another post I'll share later.
As for her relationship with Francesca and Gino, I still need to polish my ideas, but I have another episode concept in mind where Bob asks Claryce to babysit Gino while he and Francesca deal with their divorce. (Yeah, this is how she meets them - not the best first introductions to have - especially when she had no news from Bob for a good while...!)
While she resents him for disappearing without a word and faking his death, she doesn't have the heart to say no because she doesn't want the kid to deal with his parents' frequent arguing (and, well, she still cares for Bob, even if she denies it). The only issue is that her Italian is rusty... and so is Gino's English, as he just started to learn it.
Despite this, the two of them get along fairly well in the long run, and Claryce still loves to babysit him once in a while! I've already made some doodles suggesting this dynamic:
While Claryce obviously doesn't replace his mother, Gino still likes to see her as a family member, especially when she and Bob get closer. He loves his mama Francesca and his "ma' Chiara" very much!
As I said, I want to brainstorm a bit more how Claryce and Francesca's relationship would work- but I believe there would be at least some genuine respect between the two of them, even if I like to think Francesca would say Claryce deserves someone better than Bob. :')