Millions of adults feel trapped in a relationship and would LEAVE their other half if they won the lottery.
A study of 2,000 adults found as many as one in six would consider ending a relationship if a large sum of money gave them an easy way out.
And of those who DO want to stay with a partner, 24 percent DO NOT want to split the winnings 50/50.
Key reasons for keeping a majority share of the cash include not trusting the partner to keep the win quiet, and the fact 'it's my ticket, my money'.
While three in 10 of those who want to keep the money say they have an arrangement with their other half where all finances are kept separate.
Even without the issue of a windfall, twenty percent of of couples already claim they can't say they are currently happy with their partner.
It also emerged 40 percent are unlikely to tell a single soul if they bagged a win.
A spokeswoman for Lottoland, ahead of its Millionaire Superdraw which takes place on February 7th, said: "Sometimes, you have to choose between love and money, and as this study shows many are prepared to do so.
"It is quite shocking to discover just how many adults are only with their other half because they can't afford to leave them.
"And with Valentines day just around the corner, it's saddening to find there are many relationships out there which aren't happy or fulfilling."
The study also found 16 percent of respondents wouldn't necessarily expect their partner to share their lottery winnings.
However, those who did would want an even 50/50 split of the money - and 36 percent claim they would immediately ditch their other half if they didn't share the loot.
The majority of Brits are generous, with 71 percent saying the would definitely share the cash with family and friends if they had enough to go around.
But there are some that would tighten the purse strings, and keep every penny.
Three in 10 would not want others to think they were rich, while 26 percent would worry friendships and relationships weren't genuine.
But for some, a reluctance to share is largely down to an existing lack of cash - with 18 percent already saddled with too many debts, and one fifth claiming to have no money at the moment.
The average adult, polled via OnePoll, who is prepared to divide the winnings will give away 30 percent of their prize.
And when questioned about how to spend a new chunk of money, 47 percent would go on a spending spree right away.
Just one third would take the sensible route and pay off the mortgage, while 45 percent would book a big holiday.
A second property is a must for almost six in 10 adults, while home renovations - to include new kitchen, carpets, bathroom and extension - are on the list for 18 percent of folk.
The spokeswoman for Lottoland added: "Most of us can only dream about a windfall, but for some, the dream does become a reality.
"The most important thing for Brits is to keep their nearest and dearest close and looked after, which is lovely.
"Everyone thinks they know what they'd do if they won the lottery, and everyone has a plan on how to spend the money. But the reality can be very different."
Lottoland's Millionaire Superdraw, £110m is big enough to share with your loved ones and if the jackpot isn't won on the 7th, it will roll onto the following Tuesday just ahead of Valentine's Day.
* Couples who have separated after winning the Lottery.
Gareth and Catherine Bull, who won £40.6m in 2012. Adrian and Gillian Bayford, who won £148m in 2012. Colin and Christine Weir, who £161m in 2011. Les and Samantha Scadding, who won £45.5m in 2009. Jason and Victoria Jones, who scooped £2.3million in 2004.
Michael 'King of Chavs' Carroll and Sandra Aiken, who won £9.7m in 2002.