4K - Spanked while he wanks - Punishment for a sex offender - Part 1f - FULL UHD 3840 x 2160p

I needed a sperm sample from him so i instigated supervised masturbation but he seemed unable or unenthusiastic to ejaculate under my supervision so i put him back over my lap and made him wank while i spanked him to make his circulation better in his genital area which would stimulate him being able to ejaculate. i always tell naughty boys like steve that they will  get a spanking while they're wanking when i spank to make them spunk. i gave him a good hard spanking while he wanked his pathetic little penis and then let him back off my lap to have him continue to masturbate into my sample tube while i supervised. he asked if he could have my knickers to help him cum which was of course out of the question but i did take up his suggestion that i play with his balls to see of that would help. with his penis almost in my face i could clearly see his knob was shiny with wet pre-cum indicating he was close to ejaculation but then he stared to go a bit soft, possibly because of all the spanking his penis had just had from me earlier and it was clear to me that we would have to get the sperm sample later after his penis had recovered from the spankings. so i decided to just take a sample of his pre-cum on a sterile swab, and arrange to have him available later in a less clinical setting where i could dress for the occasion to stimulate him and take him in hand so to speak to obtain the sperm sample. 4k full screen 3084 x 1986