My wife had missed some days of Sawm (Fast) in Ramadan. She asked for my permission to observe Sawm and I allowed her. During her Sawm, I started to flirt with her in bed and she ejaculated.
I asked her: "Did such and such happen?" she answered in the affirmative. Then I said: "Break your Sawm for it has been broken." What is the ruling on such a case? May Allah reward you with the best.
Your wife has to make up for that day again and should offer Tawbah (repentance to Allah) and Istighfar (seeking forgiveness from Allah). (Part No. 9; Page No. 272) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.