Side note: Harry's off training to be an auror, so that's why he isn't there. And I know the dates don't add up, I did it on purpose.
"Mummy." Ginny said to her mum as she was cooking, "I have to tell you something." Ginerva Molly Weasley had just found out she was pregnant and she didn't know what to do; she wasn't sure if she should tell Harry right away, even if she has to tell him through an owl, or wait until he came home. Molly turned around as she heard Ginny say she needed to tell her something and when she saw her daughter on the verge of tears, she opened her arms up to take her into a hug. Seeing Molly's arms open, Ginny immediately ran into her mum's embrace and started to cry. As Ginny's sobs started to die down, Molly cupped Ginny's chin, softly rubbed her cheek with her thumb and brought her head up off her bosom,
"What's wrong, love?" Ginny looked up at Molly with tear-infested eyes and said a bit shakily,
"I- I'm pregnant." Hearing this, Molly put both her hands around Ginny's face, brought it close to hers and kissed Ginny's forehead,
"Aren't you mad mummy?" Ginny asked; a bit surprised but again on the verge of tears. Molly smiled warmly at her youngest and only daughter and walked over to a chair at the kitchen table. Once Molly sat down she patted her lap, indicating for Ginny to sit down; Ginny walked over and sat down on her mum's lap, without taking a second thought about it.
"I wasn't much older then you when I was pregnant with your brother, love." Ginny looked at Molly, tears threatening to spill over her eyelids. "I was 18 when your father and I got married, and I was pregnant at 19."
Ginny was really surprised, hearing that her mum was only a year older then she was when Molly had her oldest son. That's when Ginny couldn't take it any longer; Ginny cuddled up close to her mum and started to cry again.
Molly pulled out her wand and apparated the two of them to the big recliner chair Arthur had gotten from his father. Molly put her arms around the sobbing Ginny and held her close to her ample bosom,
"Why are you crying, love?" Molly asked after a few minutes of silence. Ginny kept her face dug into Molly's bosom and replied,
"I'm scared." Molly, again, cupped Ginny's chin with her hand and lifted her face up so she was looking at her,
"Why are you scared?" Ginny waited a few seconds before she started to talk, and when she did start to talk it was a bit shaky,
"What will I do with the baby? What will Harry say?" Having been through exactly what Ginny was going through, Molly smiled warmly at her daughter,
"I will always be here for you, Ginny and the same with your father. You know we will." Molly replied, "And lets not worry about Harry quite yet." Having cried earlier, Ginny was starting to get tired from all the crying she had done in the past hour and a half. Her eyes started to droop and Molly kissed her head softly,
"Go to sleep sweetheart." Ginny nodded,
"Ok Mummy." Ginny replied quietly, "I love you." Molly smiled down at her baby girl,
"I love you two, dear." Molly replied as she put her arms around Ginny and pulled her closer. Within minutes, Molly was sleeping, cradling her youngest and only daughter