Ethan Slater is not reconciling with his ex-wife, Lilly Jay, after his split from Ariana Grande, TMZ reported on Sunday. Sources close to Jay told the outlet she’s “absolutely not” getting back together with the “Wicked” actor, with whom she shares 3-year-old son Ezra. Additionally, the insiders insisted Slater, 34, is not trying to win back his former high school sweetheart. Sources reiterated Slater and Jay’s relationship is strictly about co-parenting. Slater and Jay were married for nearly four years before he filed for divorce in 2023, a week after news broke that he was dating Grande, 33, following her split from husband Dalton…