I was wondering how many keyholders Wives, Mistress or Whoever holds the keys, uses an online site to hold the key? My wife brought this up because she is having a hard time keeping me locked. Lets face it we both like having sex with one another but at the same time both enjoy denying me. Is it weird if she used a site to hold the keys for a specific amount of time?
You can have her try some of these: https://www.emlalock.com/ http://keyholder.r307.com/ You also have the option to lock the key in a combination keybox. There are probably some more sites for keyholders but this should give you a starting point.
Does your partner work or visit somewhere else regularly (or infrequently) that she might be able to safely leave the key without it drawing undue attention? Mine is stuck with gaffer tape to the underside of a bottom shelf in a public library which being none to close, and having restricted opening hours makes my visiting it to retrieve the key very difficult.