Encouraging Gemma

My partner Gemma has had a serious crush on a younger bloke that works at our local super market. She's been flirting more and more and I keep encouraging her to go further and would love to get him to fuck her with me watching

Recently I persuaded her to wear stockings and little else under her coat and go shopping. Just before we took an MMS of her getting in her car and flashing a stocking top and sent it to him

Any ideas on how I can keep encouraging her?