Dakota is shown and alleged to have “cheated” on Taylor in Season 3 by sexting and emotionally engaging with a longtime family friend of Taylor’s, specifically a close friend of Taylor’s mother, rather than a random stranger.

What actually happened in Season 3

Most recaps and coverage explain that:

  • The “cheating” was Dakota exchanging sexual messages and photos with a woman who is very close to Taylor’s family, described as essentially like family and present at holidays and major events.
  • This woman is not named on the show; outlets and forums consistently refer to her only as Taylor’s mom’s close friend or a long‑time family acquaintance.

Was it technically cheating?

Reports and reunion breakdowns point out that:

  • Dakota says it happened while he and Taylor were “on a break” or during one of their many separations, so he insists it was not cheating in a strict, technical sense.
  • Taylor and many viewers still see it as cheating or a serious betrayal because they were in a toxic on‑again‑off‑again cycle and the other woman was someone embedded in Taylor’s family circle.

Why fans are so upset

Fans and forum discussions highlight a few reasons this blew up:

  • The identity of the other woman (a trusted family friend who attends Christmas and family events) makes the situation feel like a deep personal and family betrayal, not just a random fling.
  • Online communities continue to speculate about who she is, but moderators and commenters often warn against doxxing or harassing real people over a reality‑TV storyline.

So, who did he cheat with?

To answer the exact question “who did Dakota cheat on Taylor with in Season 3”:

  • The show and reputable recaps do not reveal her name; they only describe her as a close friend of Taylor’s mom and a long‑time family friend.
  • Any specific name circulating on social media or forums is unverified, so publicly available coverage treats her identity as intentionally anonymous to protect her privacy.

TL;DR: In Season 3, Dakota is accused of cheating on Taylor not with a cast member but with a close friend of Taylor’s mother, a long‑standing family friend, through sexting and emotional involvement while they were in an on‑off phase; her actual name is not disclosed in credible recaps or on the show.

Information gathered from public forums or data available on the internet and portrayed here.