By Emma Dunn & Paige Freshwater A mum-of-12 who spends £21,000 ($26,000) a year on food and presents for her kids says trolls tell her “shut her legs” but she feels “blessed” to have a large family. Britni Church, 35, hadn’t always dreamed of having a big family but now couldn’t be happier with her brood. She fell pregnant aged 15 with her first daughter, Crizman, now 19, and went on to have Jordan, 17, Caleb, 16, Jace, 15, and Cadence, 13, with her ex-husband. Britni had a daughter Jesalyn, 11, with another partner before meeting and tying the knot with her now-husband, Chris, 32. The couple …