Open an ISA and put it in there asap. Don’t tell her if you don’t have to, but it’s there for emergencies. If you want to tell her, then tell her the full truth and that you’ve been having the odd gamble, and you’ve won a lot of money you think could help towards things.
My other half hates it when I gamble, but hates it just as much when I win because he thinks it’s going to make me want to play more. I play when I lose so a win won’t make me play more.. I’ll play just as much, if not less. All I’m saying is think about what you’re going to do before you do itย ๐