Spotted: Blake Lively and one of her family members on the Upper East Side. Just hours after the actress settled her legal battle  with “It Ends With Us” co-star Justin Baldoni on Monday, the “Gossip Girl” alum attended the 2026 Met Gala with her cousin William McAlpin by her side. Lively, 38, walked the red carpet during fashion’s biggest night in a 2006 archival Versace gown. McAlpin and another male were photographed assisting her with her dress as she made her way up the iconic steps of the Metropolitan Museum of Art in New York City. In total, the “A Simple Favor” actress had four people help her up the stairs due to the gown’s long train. Blake Lively’s cousin William McAlpin (left) helped the actress up the steps of the Metropolitan Museum of Art at the 2026 Met Gala in New York City Monday night (as seen above).…