You and Lip had been dating for a while. You had a really shitty home life, so you left. You now lived with Lip and the rest of the Gallagher family.
Monica and her girlfriend, Bob had just come back, which pissed ya'll off. Monica and Bob were trying to get custody of Liam, so they had gone to see if Liam was actually Frank's kid, or not. And to their horror, he was. So, now they were trying to get Frank to sign the papers, forfeiting his parental rights to Liam.
Which led you here, at the Alibi with Fiona, Lip and Debbie. You had all showed up to talk to Frank and tell him not to sign any papers. He was drunk out of his mind, which wasn't surprising. He always was.
"Promise, you won't sign anything forfeiting parental rights." Fiona said to Frank, clearly sick of his bullshit. "Come on. You know what a bad mother Monica is." Frank responds, rolling his eyes, which pissed all of you off. "I'm just letting her pretend that she can have him so I can get my settlement." he adds on.
"What if she doesn't give up that easy?" Fiona replies, clearly shocked at Frank's behavior. "No, no, no. This is a win-win situation. I mean, even if she takes him for a little while, she'll be back, crying about her low self esteem, or how boys actually need their fathers-" Frank rambled on and on, until Fiona spoke up again.
"I've never asked you for anything. Ever." she said, as Frank continues whining. "Oh, come on. Will you please give me some time with this? I can do this. I just- don't pressure me." He says, before he gets cut off by Lip.
"I've gotta walk away." Lip says, trying to keep his cool. "What?-" Fiona asks, confused. "If I don't walk away, i'm gonna fucking hit him." Lip says, turning around before stopping abruptly. "What the hell?" he mumbles to himself, turning back around and throwing a punch to Frank's face, making Frank fall off the bar stool with a grunt. "Fuck!" Lip groans, shaking out his hand and walking away.