Wondering About Islamic Prayer Practices? A Thoughtful Question from a Catholic Friend

Salam and peace to all. As someone who follows the Catholic faith, I use a prayer book known as the Divine Office for my daily prayers, which often involves kneeling and making the sign of the cross to begin and end. Lately, a dear Muslim coworker has shown interest in joining me during our work break when I pray. It got me thinking-is this appropriate for her from an Islamic perspective? I truly respect her devotion; she prays with such sincerity, and I sometimes join her in her prayers too. I care about her well-being and don’t want to lead her into anything that might not align with her faith. Any insights would be appreciated. May God’s peace and blessings be upon everyone. All praise is to God.