Venus in a square aspect to Pluto is a potentially difficult aspect which demands that you take the high road or else you can get slip into the darker possibilities of this planetary combination.
The Venus/Pluto square energy is most noticeable in romantic relationships. There can be intense emotions that can feel overwhelming due to either you or your partner displaying controlling or manipulative behavior. These two planets can result in arguments that can get out of hand and ultimately feel brutal as each partner goes for the other's emotional wounds. Hence, the darkest path that you must be aware of is the possibility of power struggles that can potentially sabotage the relationship.
With any Pluto aspect, there is always the challenge of using power appropriately. The square aspect represents the need of learning lessons that are forced upon us in some way. Venus is symbolic of love and money. Therefore issues centered on who has more control in the relationship around big decisions, money, and sex can come up in a very powerful way.
With this in mind, it's imperative that you don't try to 'throw your weight around' in the relationship just so that you can have more say in the affairs of the relationship. Ideally relationships should be about a beautiful give and take where the energy flows between each of you in a complementary fashion. Any effort made to be more powerful than your partner will harm the relationship in the same way that a virus will eventually corrupt a computer.
On the other hand, giving your power away to avoid conflict just to keep your partner happy is a recipe for disaster. You end up betraying yourself and losing your sense of selfhood and self-respect. Don't even think about going there! Your love for yourself should be just as strong as your love for your partner.
So what's the big lesson of the Venus square Pluto transit? Stand in your power and don't let anyone control, manipulate, or make unreasonable demands of you. If it doesn't feel right, don't do it! Likewise, use power to uplift and inspire yourself and your partner equally.
Oftentimes this is a tough lesson because Pluto indicates that we can have a primitive fear that if we don't get our way (or we don't submit), we won't be safe or we won't even survive in some way.
If you find yourself feeling this way, just take a step back and do your best to detach from emotional thinking as much as you can. Are you really seeing things clearly or are you in the grips of this intense fear that all we be lost if you don't get your way or if you don't give in to your partner's demands?
Venus/Pluto energy in its highest form is symbolic of the redeeming power of a very pure love. It's about loving your partner and yourself with heart, mind, and soul. It's about growing more powerful together through the adversity you've faced together. It's about two hearts that face the challenges of life as one. Ultimately, it's about true equality with a love transformed by fire.
Please note that the themes described above can occur in other relationships as well (e.g. boss/employee, parent/child, friendships, siblings, etc.)