There are 3 paths to Dave x Jessica and Ash x Eve - Good, Naughty, Bad
In all paths Jessica needs to be good. Ash helps her get out of drug use and gives her a positive attitude. Encourage Jess and Dave about their feelings for each other.
1. Good Ash x Eve:
What
Blurpee69 mentioned is straight forward path.
Basically choose blue options.
When you have options to corrupt Eve don't which leads to wholesome relationship with Eve.
When option comes encourage Eve to leave Dave for Ash. Ash can or will not be in relationship with her BF.
2. Good Ash x Naughty Eve:
Basically the same as path 1.
But you choose to make Eve naughty (not corrupt. That's different).
This gives you option to create open relationship or explore both your deviant side.
3. Naughty Ash x Good Eve:
Basically the same as previous path 1.
But here Ash is sexually active (level depends on your choices).
Makes Ash more aggressive in pursing Eve if you want by choosing optional red choices.
4. Naughty Ash x Naughty Eve:
Basically the same as previous path 3.
Ash is sexually active and you choose to make Eve naughty.
Option to create open relationship or explore both your deviant side.
5. Good Ash x Corrupt Eve:
Ash encourages Eve to cheat on Dave with Jack.
Be open to Dave about her cheating and encourage Eve to mend her relationship with Dave. Dave will dump Eve.
Continue to let Ash be Eve friend and pursue her leading to relationship after breakup.
Can become exclusive or have open relationship.
6. Naughty Ash x Corrupt Eve:
Same as path 5 but Ash is also corrupt.
7. Bad Ash x Bad Eve
Basically the thug path. But its basically a sharing and mini harem path with gang members.
Need Ash and Eve to embrace drug use and interact positively with gang members.
Will get option to join gang