Jack Swimming(odd sight)

So i rate it's about time i introduce myself properly to you all... you can call me Lex, i come from a tiny town in the driest, most unfriendly and also the most corrupt province in South-Africa...the hole of holes if you will...life for me obviously didn't start here but i'm not going to go further back than my current surroundings...i'm too lazy. Jack (my brother) and Mel(Jack's fiance) came to visit over the weekend in celebration of his Birthday...We went to a nature reserve which features a lake and campsite for fishing and boating and swimming and whatever you want a lake-side tent for... Jack was obviously there to swim(not that we don't have a pool in pristine condition back home...) because within 10minutes of your arrival he was swimming to the other side of the lake...During his absence the conversation went something like this:

LEX: Do you-guys think he is going to make it back?
MEL: Of course he will! i hope so...can you see him?
DAD: There he is...maybe we should have timed him...
MOM: Oh yes! That's a great idea! We'll have to do that when he starts swimming back!
LEX: IF he starts swimming back...
MEL: Does anyone feel raindrops?
MOM: Yes.
DAD: No.
LEX: Shall we start packing up then?
MEL: No! Where's Jack? Can you see him?
LEX: nope, maybe he got run over by a boat...
DAD: The wind is starting to pick up...Maybe we ought to get home soon.
MEL: No, what about Jack?!
LEX: He's already wet, Mel!
MEL: But we just got here...!
DAD: As did the rain...
MOM: Did anyone bring any towels?
DAD: No.
MEL: Oh i didn't think of that...
LEX: That's funny, considering you are ALL wearing swimsuits.
MOM: Im going to walk to the jetti...maybe Jack can hear us from there, Mel?
MEL: Okay, i'm coming.
DAD: Tell him to hurry up! ...Anyone seen the car keys?
MOM: Check between your legs, love.
DAD: Found them!
LEX: Well i'm going to sit in the car, no point hanging around with white pants on...
DAD: Ought to leave him behind, the walk home would do him good.
LEX: I don't think his smoker-lungs are going to last...
DAD: Well i sure as hell am not going to fetch him on the other side.
LEX: Don't worry, Mel will...She'll probably borrow one of these fishermen's boats.
DAD: And fish him out?
LEX: If she can find him... Watch that boat... i don't think they can see him in the water...
DAD: Oh yeah, that's not very good.
MOM: Look what I found! Those people having the picnic in the camp next to ours left foiled potatoes in the fire...anyone want one?
LEX: Are they still hot?
DAD: No love, you can't take someone else's food!
MOM: They left about 20minutes ago, i don't think they are going to drive back to get four potatoes
MEL: I'm fine thanks...
LEX:  Do we have salt and pepper?
MEL: Do you think the fishermen would let us borrow one of their boats?
LEX: No.
DAD: I wouldn't.
MOM: You need not worry about Jack, honey, he's a big boy now...
LEX: A big boy? really mom; i haven't noticed...
JACK: Did you see that?!
MOM: Yes my boy! you did great!
MEL: Thank god your back alive...
DAD: Actually we were just leaving so your right on time, Jack.
JACK: Aww, but we just got here dad!