Toddler Mark Andrews bends down and tenderly kisses the top of his mother's head - because at 19 months old he already towers over her.
Marie, 32, from Milton Keynes, Buckinghamshire, has a severe form of brittle bone disease which means she is just 17in high, while her son is almost twice her height.
At 32in, the boisterous tot could cause his mother serious injury because her bones fracture so easily - she recently broke her knee just rolling over in bed.
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