Part IV of my "Shepard is jealous dialogue" - just for the info:
since Kaidan is still alive Ashley doesn't know that Shepard has
feelings for her. It's going to be the final part.
Part IIIJoker: Commander, we're nearing Virmire. Seems they didn't detect us.
Shepard: Good job, Joker. Bring us to destined target.
Joker: Aye. ETA ten minutes.
...
Shepard: Lieutenant, Chief, I need you two in the away team. Any questions?
Kaidan: No Sir, I'm ready as ever. Chief?
Ashley: Aye, Lieutenant.
Shepard: Good. We still have five minutes left. Chief, I need to talk to you. In private.
Ashley: I don't see what we should talk about, Sir.
Shepard: Ashley ...
Kaidan: Ashley, give him a chance.
Ashley: If you two insist - what's up, Shepard?
Kaidan: You know where to find me - in the Mako.
Shepard: I'm sorry, Ashley. I messed everything up-
Ashley: Sorry, Shepard, you had your chance. Not only you were acting like a jealous teenager, you also stalked me and Kaidan. What were you thinking how it looks? My own Commander is stalking me.
Shepard: It wasn't stalking. I checked the weekly logs and saw that you and Kaidan spent a whole night together. Maybe I shouldn't have asked ...
Ashley: Good idea. Keep that in mind next time. Anything else, Commander?
Shepard: Yes. Kaidan came to me a few hours ago and told me what happened that night. And I need to apologize once more ...
Ashley: Accepted. Shepard ...
Shepard: I just want to let you know I care a lot about you, as friend and ... and comrade. And I'm sorry for what I said to you. For everything.
Ashley: Skipper ... do you really wanna know what happened that night?
Shepard: Only if you want to tell me.
Ashley: I do want. Skipper - I had to talk to someone. And Kaidan is a good friend, so I went to him and we talked the entire night about everything. Most stuff was about a certain man I care a lot about. Maybe more than it's allowed, okay? He saved me once and gave me a new purpose. And he made me feeling better.
Shepard: Hmm ... I see.
Ashley: I was talking about my commanding officer, about you. I like you, Skipper. And you almost destroyed anything with your stupid jealousy.
Shepard: I know-
Joker: *intercom*
Sorry, have to disturb, we're almost there. 30 Seconds till drop of the Mako. *intercom*
Shepard: Good timing, Joker.
Ashley: *whispers* Yeah, "good timing", Joker ...
Rest is up to you.