Abdul Mohammed and Kerri Jackson were both previously charged with engaging in sexual activity in the presence of a child over the incident, to which they both pleaded not guilty.
The charge involved an allegation of the pair, aged 45 and 31 respectively, having sexual intercourse within a coffee shop while children were present in the premises.
However, at a recent hearing at Chester Crown Court, both defendants pleaded guilty to an alternative count of performing an act outraging public decency.
They were subsequently sentenced for their actions, admitting that they outraged public decency by behaving in an indecent manner through performing a 'lewd, obscene, or disgusting act'.
On one day in summer last year, at around 5.30pm, two young teenagers attended a coffee shop in Runcorn.
They sat down and had something to eat, being served by Jackson, of Humphreys Close in Runcorn, with their view of the counter said to have been 'partially obstructed'.
Mohammed, of Bell House Road in Widnes, served them with their burger at their table and then went back over to the counter.
Upon finishing their food, the boys took their plates back to the counter to be helpful, and to tell the workers in the shop that they had enjoyed the food.
However, when they have approached the side of the counter, they noticed Jackson and Mohammed behind the counter, with neither said to have had any pants on.
When both noticed the boys, they are said to have become flustered and started to pull their trousers up.
In the process, Jackson reportedly fell to the floor while trying to cover herself up, and her buttocks area was said to have been exposed to the teenagers.
The complainants are also said to have seen Mohammed's penis and genital area before he managed to cover it up.
Following the incident, the teenagers left and reported it to responsible adults, and the matter was reported to Cheshire Police via their parents being informed.
Having accepted the alternative charges, the pair were sentenced by judge Steven Everett.
Both were handed 12-month community orders, which include 100 hours of unpaid community work.