Kel Mitchell’s ex-wife shut down claims made by the former Nickelodeon star in a new TikTok video, sharing her side of the story after he accused her of cheating and getting pregnant by other men during their marriage between 1999 and 2005. Tyisha Hampton spoke about meeting Mitchell on the set of Good Burger, stating the first red flag she noticed in their relationship was a lack of self-confidence on his end. “Don’t ever get into a marriage with anybody who is insecure,” she advised at the start of her video while addressing allegations made by Mitchell on Shannon Sharpe’s Club Shay Shay pod…