Nude favors (Patreon)

For those who have already played the game, you will notice that the characters talk about trading favors in return for reform points (not in the game yet). One of these favor is undressing. The question is... how do we handle this?

1. The easiest option would be for the character to simply take off her clothes, but I feel like it doesn't really feel like a reward to the player if this happens.

2. The slightly more involved option would be if you get to see a completely new CG where the character is posing naked for you. However, that too might become boring in the long run.

3. Finally, there is the option to have several nude pictures made, and randomly one of them being shown to the player. Adding the challenge to collect them all. The obvious downside to this is a large resources cost and will slow down development, cause my artists will be hard at work drawing all of these.

Personally, I really like option 3, but the downsides also shouldn't be ignored. What do you think is better? 

The idea is that the same will be done for future favors. Meaning more sexual poses / different angles. It's ambitious and will make the game better in the end, but is the increased time for development worth it to you?