son sees you in the onlyfap outfit. It's possible he also needs to have watched you do the friend, as the focus is him being a cuck.
once I hit 35 corruption, and have onlyfap, it's pretty much the same every day. walk in sons room in most recent sexy outfit, BJ at the collage twice, go to work specifically for the boss sex bonus, as the bonus causes the day to not progress I hit the school again. as its now evening, check if friend is in and if so walk in in sexy clothes and usually by the third time I can let son watch. Usually by day 12 he's watched me screw gym girl, and best friend so walking in triggers a conversation about being a cuck, (check his computer when he's not there or asleep for if he's looking up what a cuck is and cuck porn). Usually by this time I'll have the onlyfap outfit and will trigger the next two walk-ins (morning &friend) using it. Corruption ~60, and having done all that, I always get the text event. Sometimes I'll have nude, but not always. If you don't have the cuck convo, go back in wearing normal or PJs, sometimes the exposure event overrides progressing his story events. (Inculding getting nude, though sometimes that becomes all he'll talk about until after you pay nerd to advertise for you at the school. (My first time, I didn't show son the outfit until after I'd sold him magazines at the adult shop, which is why I know it's related to getting the texts)