OP - could it be that she was developing in some other way at that time. SIL's little one would often forget to go to the toilet when they were really busy playing/distracted, even after being TT for awhile - maybe that's it?

AFU - DS is not saying words properly. I'm also a little concerned about him being sensitive/gentle. He's settling in at daycare but he's still interested in doing his own thing and i'm not sure if I should be worried or not. Rang the speech pathologist to talk with them about his speech issues.