At the psychotherapist

At the psychotherapist's
Patient : "Well, I'm still worried about my youngest son. He's still quite high strung whenever I'm around. I feared he might even be sort of backwards in English, and that I would might have to send him to a speech therapist or something. So yesterday I decided to have lunch with him. I wanted to chat with him in order to see if he would could understand indirect speech or a summary of what he would have told me (this doesn't really make sense with the rest of your sentence). He seemed to get it, I'm so relieved... Well, anyway at one point he told me that his little friend John had always has plenty of marbles. There seemed to be some hint of a meaningful glance in his eyes, so I thought he was going to ask me to buy him some marbles, but no, no way, he got cold feet or rather he kept his usual cold feet (this expression doesn't work like this. You could say instead "but no, as usual, he got cold feet"), and didn't ask for anything. I told you, didn't I? That Whenever he catches sight of me, he's always looks like a deer caught in the headlights, or else alternatively like some ethereal ghost. I don't know which I prefer...
But with my second daughter, he it is quite different. Once, by sheer luck, I happened to see them (you must state what you saw them doing; playing, talking, interacting), unbeknown to them. With my daughter, he's quite relaxed, he might even laugh heartily, play tricks or even demand ask for toys. When she was younger, I would suspected that she would had stollen some money from my purse, though not for her though, since every time it happened, I saw my son a few days later with a new toy, gadget, book or what have youever. I should have punished her for stealing the money of course, but I didn't feel like it, so every once in a while I would surreptitiously put some money in her piggy bank. Since the thefts stopped, I am pretty sure that I was right about the culprit. Oh, well... Topsy-turvy world (this is weird here)... I think she got it about the situation just after my son was born (really awkward, maybe try "I think this situation must have started just after my son was born"). She may must have decided then to take care of her baby brother. But now he's eight years old and she's still on duty. She will soon turn fourteen and will soon after she will take an interest in boys and friends and going outs (do you mean this as a noun or a verb?). I fear he might then feel abandoned then." 
Therapist : "How about his father? How do they get along?" 
Patient : "My husband told me he seemsed more relaxed when the two of them are by themselves, but only slightly so. And anyways, as I told you, I'm not sure our marriage will continue, so I think I had better tackle my son's problem as soon as possible." 
Therapist : "This is the end of today's session."