The Olympian, 31, tied the knot with Gordon Ramsay's eldest daughter, 26, at Bath Abbey in December amid a bitter feud which saw his mother Caroline, 60, disinvited.
The Little Mix singer, 34, flaunted her incredible physique in the leather two-piece ensemble as she brought some glamour to the A-list event in Bond Street on Friday.
Bethany, 32, was accused of 'betraying' her family when she pledged her allegiance to her brother, having attended Holly Ramsay's hen do and their wedding at Bath Abbey.
Netflix's Being Gordon Ramsay follows TV chef Gordon, 59, as he juggles his family life with his new business empire - and his daughter Holly and Olympic swimmer Adam are seen in the show.
Caroline Peaty is seen embracing her soon to be daughter-in-law Holly Ramsay in a scene from the new show, launched on Wednesday, despite making a request to be edited out.
The Olympic swimmer, 31, marked Valentine's Day with a sweet post featuring his wife looking elated as she was surprised with a room filled with white, silver and pink balloons.