Today Ollie was confronted about him possibly being a bit too close to Jessie by April, Libra and Keesha and he was not pleased about it. So after that it seems he kind of kept his distance from April today and it came to a head later on in the evening.
From what I have picked up they had a fight in which Ollie said he felt disrespected by the women for doubting him and his relationship with Jessie - suspecting he might be aligning with him. The discussion went on to a point where Ollie apparently said that he is not the same person inside the house as he is outside. April was really bothered by this because she feels like she is the same person inside the house as outside.
So right now the showmance appears to be on the rocks, but it certainly might fire back up.
If CBS decides to go into this relationship you can also expect to see a convo going on right now between Dan and Ollie where Dan asked Ollie if he had to choose between winning the game and having a relationship outside the house with April - Ollie replied, "That's the half a million dollar question."