"Ex's Tits"

You're still friends with your ex and she's invited you to her garden party. You're having a conversation inside and are happy things aren't awkward between you two, but then she catches you having a look down her dress at her cleavage. Bonnie says you can't be doing that seeing as she has a boyfriend now... but there's clearly still sexual chemistry and she can't help but tease you and encourages you to wank for you, for old times sake!