After a few months Momo gave birth to Izuku's child. The child was a boy named after a distant relative of Izuku, Izuna(Madara's brother) was the name.
Momo was very happy that she had Izuna because he reminds her of Izuku and Izuku stayed watching their lives from afar and protecting his family from the shadows.
6 years has passed.
Izuku: *thinking on a rooftop* I love you all... I'm sorry that I can't be there for you and Izuna.
Izuku then sensed a familiar chakra behind him, he knew it was Bakugo.
Izuku: Hello Ground zero... Or do you prefer Katsuki?
Bakugo: I-Izuku? We all thought you died!
Izuku turned to see Bakugo, Momo, Aizawa, and Izuna.
Izuna: Momma, who is he?Momo: *crying* I-I-Izuku...
Izuku attempted to walk over to her and hug her but Izuna got in the way.
Izuna: NO! YOU'RE NOT GONNA HURT MOMMA!
Izuku: *smiles and kneels down* I admire you for protecting your mother, but I would never harm the mother of my child.
Izuna: What do you mean? Who are you?
Izuku: My name is Izuku Uchiha... Your father.
Izuna was shocked because he never knew who his dad was and Momo never spoke of Izuku to him.
Momo hugged and kissed Izuku and then slapped him.
Izuku: I deserve that... Look Momo, I'm sorry. I didn't intend to hurt you, I only wanted to protect you.
Momo: *upset and enraged* BY FAKING YOUR DEATH?! WHAT KIND OF MAN ABANDONS HIS FAMILY LIKE THAT?!?! *sigh* Go away... You are not welcome here anymore, I can't be with you...
Izuku: *crying* Momo... *activates Rinnegan out of heartache* RAAAAAAAAAAAAAGH!!! *drops to his knees* AAAAAAAAAGH!! WHYYYYYYY!!! WHY ME GODDAMMIT! WHY! WHY! WHY AM I LIKE THIS?!?! I hate myself... I should just kill myself.
Izuku was now in extreme pain and was crying tears of blood.Izuna hugged Izuku and spoke.
Izuna: Please... don't leave.
Izuku deactivated the Rinnegan and hugged his son.
Izuku: As much as I don't want to leave, I have to... Your mother has made it abundantly clear that I'm not welcome.
Izuku then left.