💳The sister's boyfriend prefers to pay with his credit card and collect cash from others when splitting the bill.
💰The woman feels uncomfortable with this arrangement and prefers to pay her portion directly.
🙅The woman should communicate her discomfort to her sister and her sister's boyfriend to find a different solution.
💡Possible alternatives could include Venmo or other payment apps that allow individuals to pay their portion directly.
🤝Open communication and understanding between all parties involved is essential for finding a mutually agreeable solution.