Speculum training

My current partner has unusual tendencies. He inquired about observing me pleasuring myself with a large artificial phallus. Upon agreement, he then requested me to insert a medical device into my stimulated genitals and widen it so he can see the innermost parts of my obvious opening, even beyond the cervical opening.
The spectacle was recorded via videos as he found the concept highly arousing and was driven to ejaculate on my visibly stretched lady parts. Caution: suggestive content relating to medical tool usage.