It seems obvious to me Mr Tombe wasn't about to pay support for a kid not his own. The situation was probably further aggravated by Rose Tombe's infidelity, but perhaps she mistook Mr. Tombe's offer to wear horns in the bedroom.

Every time a marriage breaks down,

it is always the kids that suffer.

...though it's probably a good idea to skip the 'mayonnaise'.

ROFL Thats it, tea went all over the laptop at the mention of mayonnaise =D

You mean he was having an orgy with the chickens too?