There is a growing love triangle between the trio following Monday night's recoupling.
Megan had got previously got with Wes after he dumped Laura, but Megan then dropped him for new guy Alex.
In tonight's show, Alex is suspicious of Wes and Megan’s connection not being over.
In the Beach Hut, he says: “I am suspicious of the Meg and Wes situation. There’s something going on and I need to find out what it is. If I’m right in what I’m thinking, it’s deceitful. I need to talk to Megan straight up. I’m not going to sit back and take it.”
He speaks to Charlie about it: “There’s something sly here, something is going on. I’ve just seen Wes and Megan come back from wherever… I’m putting two and two together and I’m getting four.”
Charlie says: “I think with Megan, she can be easily swayed.”
Alex replies: “Something is not adding up here mate, at all.”
Meanwhile, Wes goes to tell some of the boys about his chat with Megan on the terrace.
Wes says: “She said ‘I don’t think you need me to tell you that I still fancy you and that I still like you in that way.’”
Megan tells Samira: “I just spoke to Wes on the terrace and you know how I feel, I can’t hide the fact that I fancy him. Nothing happened. I could have easily [kissed him] he did look very cute.”
Samira reacts: “Oh my God, your head has gone.”
Megan admits: “I was so happy when Alex walked in, I was like ‘he ticks every single box.’”
Samira tells her: “All you’ve got to do is sleep on it because this is new.
"You’ve buried the feelings that you had for Wes and now you’re lifting them up again. Chill tonight and wake up tomorrow morning and see how you feel.”
In the Beach Hut, Megan talks about Wes: “I don’t know what I want. I don’t know what it is about him, he cracks me up, he’s really attractive. It scares me but we do have a really good connection. So tricky!”
Later, New boy, Alex pulls Megan aside for a chat and asks about her conversation with Wes.
She tells him: “Me and Wes laugh and joke and he’s a good looking boy but it’s early days, I’m not going to rule anything out but I’m happy with you right now otherwise I wouldn’t have coupled up with you, I would have waited for Wes.”
Alex says: “So I’m not being a complete idiot here and thinking there is still something with you and Wes then?”
Megan replies: “You’re not being an idiot.”
Alex comments: “I know when someone is checking someone out. I’m not a jealous person, I don’t think that’s 100 per cent done.”
Meanwhile, Dr Alex and the boys look on at the conversation. Alex says: “He can sense that things aren’t quite right today.
"He knows Meg has history with you, Wes. He’s not stupid.”
The next morning, Megan and Samira have another chat whilst getting ready.
Megan says: “There are pros and cons to each boy and it’s just a case of weighing that up. I can’t help how I feel when I see Wes chat to Ellie. I do get a little bit jealous and I know I have no right to.”
In the Beach Hut, Megan admits: “I’ve woken up and my mind is still all over the place. I feel like Alex is lovely but there is not chase or fun there, I know I’ve got him. There’s just something there with Wes. I can’t put my finger on it.”
Love Island 2018 airs tonight at 9PM on ITV2.