That was a good way of looking at things, though Stiles wasn't sure he would agree with her about him being strong. If he was stronger, he wouldn't have let the Nogitsune take him over and Allison wouldn't have died and... he shook his head, forcing those thoughts out of his mind. The constant litany of 'what if' wasn't going to change the past and he knew that he needed to make an effort to stop thinking that way.
"You've definitely grown," he said. "Emotionally, I mean." He certainly didn't want her to think that he was calling her fat or anything crazy like that. Pregnancy hormones were terrifying and he was trying to do whatever he could to keep Malia happy and calm.