It should be pointed out that Frank Castle has met Matt's mother, Sister Maggie, and she was emotionally supportive when he needed it most. Yes, it's alluded that she knows exactly who Frank is to Matt, too. Because the Punisher should slow down long enough to show that the guy who hates Matt sooooo much (allegedly) should be shown to have some ties to Matt's mother like a proper boyfriend, right? Pretty sure many of the writers have been flying the Frank/Matt flag for years.
(As for Matt's mother, the story is that she had awful postpartum and tried to hurt/kill Matty when he was a baby. Jack saved/protected Matt, and Matt's mother left them and went to stay at a convent and never came back. Yes, the convent of Saint Agnes, Order of Mercy, where Matt ends up later. The same Saint Agnes we see in the MCU. The same Saint Agnes Frank is visiting in the screenshot below.)
Frank has met Matt's mother
http://41.media.tumblr.com/67b9a141a2e5d8225830654231e0f181/tumblr_inline_nryz3zR88P1qbwzba_500.jpg
http://41.media.tumblr.com/1bb881ef9019eac7167833c684f23276/tumblr_inline_nryz4vhC0q1qbwzba_500.jpg
(As for Matt's mother, the story is that she had awful postpartum and tried to hurt/kill Matty when he was a baby. Jack saved/protected Matt, and Matt's mother left them and went to stay at a convent and never came back. Yes, the convent of Saint Agnes, Order of Mercy, where Matt ends up later. The same Saint Agnes we see in the MCU. The same Saint Agnes Frank is visiting in the screenshot below.)
https://41.media.tumblr.com/a599abdfdb1f3f9e4f780f1e8162242a/tumblr_inline_nrz62dtk5D1qbwzba_500.png