He felt something stir in his chest when she sighed happily. He wanted to make her happy. He wanted to be happy with her and if this was what would accomplish that then he would try his very best to ensure that it happened. He wasn't sure if he could say he was ready .... ultimately, he didn't really care for that term. It was a little too cut and dry for a situation like this.
"I don't think anyone can really be ready for this," he responded, after she had released him from her kiss. It was a lot to be ready for and you could never tell what was going to happen or how everything would turn out. "but, I don't want to give this up, either. I'm not going to be completely ready whether we have a child now or three years from now. Learn as you go, right?"
He'd voiced the concern of being ready with Arthur and he could safely say that his outlook at the current moment had been greatly influenced by the older man. He never thought he'd see the day when he would turn to Mr. Weasley for this sort of advice ... but, in the end, he was glad he had.