Yeah i agree, thats bullshit.you may be right about the sex tape but.... I hard disagree about her being a user. I could maybe see your point if there wasn't trauma and abuse on her end which perfectly makes sense why doesn't let the MC go all the way. In the last 2 updates she has done more than previously so I do think she will be there soon
Erryn is giving the mc her all at this point, visiting him is literally the first thing she does in the morning when she wakes up every single day, its not like she only approaches him if she needs something from him, she enjoys to be around him all the fucking time very obviously.
And while i think its a bit dumb/strange/made up for the purpose of the story - giving her all simply doesnt involve sex yet as she is not able to do it yet. She even called the mc accidentally her boyfriend in the last update which shows her mindset.