Wife [34f] gained some weight after giving birth 3 years ago and doesn't feel sexy anymore. I'm [35m] just as attracted now as I was before but she feels insecure. What can I do?

She's probably slightly overweight, I haven't been counting the pounds. It's whatever for me. I think she's sexy AF and honestly don't care. In fact, I kinda like her curvier body a little bit more? I haven't told her that, though, since it could hurt her.
But the point is, I don't care, but she does and feel unsexy and inhibited. She's become more self conscious, not as comfortable with herself as she was before. I tell her how attractive I find her just as often as before but she doesn't think she's all that sexy anymore.
In general, she seems a bit more insecure than she was before and it hurts a little bit to see. I think she's been a great mom, she's hardworking and I couldn't ask more of her as a wife.
She used to be very physically active before and used to go for walks and hit the gym. She stopped after the baby and hasn't restarted. In general, we eat well, we prepare most of our food and don't eat order or eat out too frequently, so she has that going for her if she would like to be more active again.
But... I fear that if I tell her about it, it'll make her more insecure, make her feel pressured or pointed at, which is not at all my intention.
Is there anything I can do to help her feel a bit more secure and better with herself/her body?
tl;dr: Wife gained some weight and feels insecure with her body/image. Is there anything I can do to help her feel more at home with herself?


Source.