The mod was created by a 3rd party that doesn't have a full understanding of the game design. Whilst some elements of the mod like adding credits is pretty simple, the love points implementation in the game is more complicated. The mod is known to cause problems in this area. The love points are designed to be in the 0 to 10 range, but the mod artificially reassigns values without recalculating the balancing formula. If rather than just changing the values they were to instead create a '+' button against each character, using the in game code such as call love_calc (kar,5) it would work fine as it would be equivalent to having a lewd act with one of the girls. Note that relying on this mod when playing the game will actually detract from the experience IMHO.
There is not a specific pattern, however you need progress degree of lewdness, without going to fast. This is expanded in the next update and will include some repeatable animations.