Chastity and orgasm denial discussion

Exactly two years ago I began my path into chastity. My KH wife supported a complete transformation of who I am, while still encouraging me to be the loving and caring husband she wants. Over these last two years we have maintained PIV intercourse at least once every week. The other night, she announced that starting today our frequency will slowly drop: first to one time per month, then to twice a year, eventually settling on three or four times annually. But this change won’t stop her from enjoying sex. I must provide oral pleasure for her at least weekly, and whenever else she calls for it. This news caught me off guard; I’m not quite sure how to respond! The one thing I do know is that I wouldn’t dare argue against what she has suggested. Do you consider this a move into serious chastity? What’s the best way for me to handle this shift? I feel somewhat nervous!!