Do we know the particulars of Mark's background? Does he have siblings, if so where does he rank in birth order? I really need to understand what made this man.
My hypothesis is that he is the youngest of three brothers. The older 2 are very close, quite outgoing and doing well in their careers. They play rugby together at the weekends. There's quite a large age gap between him and the others, so they were never close and mostly ignored mark. His first dalliance was with a girl who always saw him as a friend (loved to vent about her crappy bf, always wondering why more boys couldnt be caring like mark). She used him as a rebound when her bf cheated on her. They slept together once and but she ghosted him afterwards for 2 weeks. When she re emerged, she said she's not in the right headspace and needs to stay single for the summer. Days later she posts a pic of her and her former ex bf at Glastonbury loved up having giving love another go after watching an MGMT set reminiscing about 6th form. The instagram post has a valencia filter.
Anna is the perfect life partner because she looked up to him and admired him, something which he never experienced home. She makes him feel seen when every other woman sees him as just a friend, whilst the men in his life pity him for being a house husband who cannot even manage his house (see leaky roofs, mould, mice etc). She's provided him with a son and heir who will always look up to his dad and see him as a hero. She's the Plain Jane Seymour to his Henry VIII.
Last year, Anna and Mark had movie night in and watched don't worry darling whilst drinking mothball espresso martinis. That night he laid in bed wondering if the Victory Project ever be a reality in his lifetime so he could finally seen as worthy to the rest of the world.