Although Collin Gosselin plans to appeal the Marines ... He also shared that writing a letter to his dad, Jon, was the "one thing" that helped him "mentally figure out that there was a way ...

At the time, Collin had accused Kate of verbally ... were present to witness the occasion, with her father becoming emotional after Gosselin asked his daughter to become his wife.

Collin Gosselin gave his dad, Jon Gosselin, a special shoutout on Instagram, following his high school graduation.

Gosselin Sextuplets Turn 19 as Their Dad Jon Shares Throwback Pics: 'I Love You All So Much' Collin Gosselin Gives Rare Interview About Reality TV's Toll on His Family: 'I Think It Tore Us Apart ...

Jon Gosselin is clarifying where he stands with ex-wife Kate Gosselin more than a decade after their acrimonious split.