Sojiro really is a nice guy. Waiting to consummate in order to give his wife a way out in case she really doesn't want this forced marriage. But she's sure taking her time to answer the confession he made in this chapter.
I wonder where Chiyo's sister was, was she not invited to the wedding? Her presence would likely have relieved much of the tension Chiyo was feeling; and she probably would be giving pointers for the consummation act.