A devastated mother has poured out her soul in a fresh appeal for her missing children nearly half a year after six-year-old Lilly and four-year-old Jack Sullivan disappeared from their secluded family property, while fresh court docs reveal cops dug into her deleted phone app amid neighbor reports of suspicious overnight activity that left investigators chasing shadows.

Malehya Brooks-Murray, the youngsters’ mom, took to the “Find Lilly and Jack Sullivan” Facebook page last month with a raw post detailing her unending pain, vowing never to stop looking as winter looms over the dense woods where the kids were last believed to be.

“As a mother I love my children more than life itself and feel so heartbroken not being able to hold my two children Lilly and Jack, kiss them, breathe in their scent or tuck them in to bed,” she wrote on October 13, adding that the agony of not knowing has wrecked her world.

The plea comes as Royal Canadian Mounted Police push forward with a massive probe, offering a $150,000 reward and planning spring blitzes, but insiders say unsubstantiated tips – including late-night vehicle rumblings – have kept teams on edge without panning out.

Lilly and Jack lived with Brooks-Murray, stepdad Daniel Martell, and their baby sister Meadow on a cluttered spread owned by Martell’s folks in Pictou County, surrounded by thick brush and steep drops that fueled early fears they’d simply wandered off.

The nightmare kicked off May 2 when Brooks-Murray dialed 911 at 10:01 a.m., saying the pair slipped out a silent sliding door while she and Martell dozed with the tot after a restless night.

Stepdad Martell told cops he heard Jack in the kitchen and Lilly popping in and out of the bedroom between 8 and 9:40 a.m., figuring they grabbed their boots – pink for her, blue dinos for him – and bolted through the back fence.

But court warrants paint a murkier picture: Neighbors Brad Wong and Justin Smith swore they heard a loud ride peeling in and out multiple times after midnight, with lights flashing over treetops – one even pegged it as Martell’s truck looping five or six times.

Martell fired back, calling it “complete nonsense” and insisting his wheels never budged.

RCMP spokesman Cindy Bayers shut it down last month: No proof of any vehicle, and it ain’t a “key element.”

The real eyebrow-raiser? Docs show Brooks-Murray admitted using the TextPlus app to ring her mom and grandma post-disappearance via Wi-Fi, then deleting it because she “didn’t need it anymore.”

Cops snatched her TextPlus records from May 1-2 anyway, results redacted but clearly part of the deep dive that had them polygraphing parents and kin.

Both Brooks-Murray and Martell came up truthful in May lie detectors, with an investigator noting no grounds for criminal vibes – yet the probe rolled on with half a dozen more polys, including bio dad Cody Sullivan passing clean.

Family blew up day one: Brooks-Murray’s side accused Martell, leading his mom to boot them off the land. She grabbed the baby and split to relatives elsewhere in Nova Scotia, changing her status to single and blocking Martell cold – no chat since.

Martell stayed put, griping he’s the only one “still here fighting.”

Paternal grandma Belynda Gray’s been boots-on-ground, hitting woods and pushing for answers, while maternal kin stay quiet on police advice.

Searches went mega: 160 volunteers, drones, choppers, K9s scouring miles of forest and water early on, scaling back when no trace turned up – unlikely alive after days in the wild.

Renewed pushes in May and October found zilch, including no remains in a fresh sweep.

Volunteers from Please Bring Me Home gear up for a November 15 waterway hunt as levels drop, with exec Nick Oldrieve saying spring’s prime for full-force RCMP returns.

Cops reviewed hundreds of hours of video, 488 tips, 54 interviews, seized gadgets – even a recorded call where a relative spun theories on Brooks-Murray’s role.

Last confirmed sighting: Dollarama cams nabbing the fam May 1 afternoon.

Brooks-Murray initially floated bio dad Cody snatching them to New Brunswick – cops checked tolls, visited him at 2:50 a.m. May 3; he hadn’t seen ’em in years, still paid support.

No Amber Alert: Didn’t fit abduction criteria.

Online sleuths buzz with timelines – kids home sick, unaccounted hours, past-tense slips – but RCMP’s Staff Sgt. Rob McCamon insists they’re chasing every angle with national backup.

As snow threatens, Brooks-Murray clings: “Someone, somewhere, knows something so please bring my babies home.”

The $150K bounty looms, volunteers rally, and a province holds breath for breakthroughs in one of Canada’s most baffling kid cases.