Does a wife's apostasy affect her marital relationship and marriage contract if she does not recite the Two Testimonies with concentration after apostatizing, and is it necessary to renew the marriage contract?

Assuming the wife uttered a word of apostasy, then repented and prayed, she has thereby returned to Islam, and her marriage remains valid and does not need renewal.

Prayer is an evidence of Islam, as Ibn Qudamah mentioned.

The wife's occasional forgetfulness in her prayer does not prevent her return to Islam through her prayer.

It is necessary to beware of indulging in these whispers (waswas).