The full Victoria ending is unreachable without cheats.
To see the full scene, you need 6 v_lust points, which is impossible to obtain.
These points can be earned at exactly 7 instances:
3 in the first chapter
1 in ch3
1 in ch4
1 in ch7
and 1 in ch11
The 2 from the first chapter are locked behind the (dinner) sex scene, so you can't skip the sex scene.
However, to get the point in chapter 4, you need to refuse the sex in chapter 1, so you have to get all the other points.
The problem arises in chapter 11, where you need to have five relationship points to get the last point, which is simply unachibable if you stick to the choices necessary to get the other five v_lust points.
Technically, it is possible to exploit the sex scene in chapter 7 in order to repeatedly lower the number of v_lust points until the negative range of the variavle is exceeded, which would cause it to jump to a positive value, but I am not so determined to repeat these animations 2,147,483,650 times xD
I spent about an hour or more looking at the code and trying to find a potential path...