The source adds that her friends 'expressed their concern' over the whirlwind romance.
Christina announced that she and Ant 'made the difficult decision to separate' earlier this month.
The news comes just weeks after their son, Hudson, celebrated his 1st birthday.
The couple tied the knot in a surprise wedding on Dec. 22, 2018.
'Life has a funny way of letting things fall into place when you least expect it.'
ET exclusively spoke with the motor specialist about his new 'Master Mechanic' series, which will feature his wife and their newborn.
Christina and Ant's baby boy joins big sisters Amelie, Taylor and brothers Archie, and Brayden.
