Once he’s not in a relationship with any of them, the ex-girlfriends get together and start piecing together Bob’s strange backstory (rather like true crime podcast producers, though they didn’t exist back then).

Source: https://www.theguardian.com/tv-and-radio/2023/jul/15/where-should-we-begin-with-esther-perel-6-review-the-girlfriends-the-crossbow-killer-get-birding-city-girl-in-nature

The Sun revealed cops were investigating George after three of his ex-girlfriends raised concerns when they saw him on the show.

Source: https://www.thesun.co.uk/tv/24004966/mafs-married-at-first-sight-uk-2023-live-contestants/