So setting aside that he is suspicious and he does put up a fight, what specifically are you suggesting as a possible solution?
More dialogue, where he complains more?
A player choice, which would give you the option to complain more?
You keep mentioning a "scene to prove nothing happened" - what scene would that be?
What exactly is "enough?"
Keep in mind he's not in a position to just refuse and leave (you'd effectively be choosing immediate game over if it was made available as an option), and Baleflight has no female assistants (or any assistants, really, it's just him and a bunch of "undead").
And to address things in plain language again - Baleflight literally never makes physical contact with Melissa
If you ask me how I will reshape the story, the my way, here's how
But again it's your game, your story, take my opinion with grain of salt
I'm gon keep it short
Nah, not prolong the complain
Prolong the story of the city
Make mc found proof of baleflight dirty works
Even within short timeframe like a single day
That way mc can go offensive and confront and fight baleflight rightaway and get more proof of all his dirty works after he die
That way mc don't have to let Melissa go and let her become labrat or the possibility of the scientist touch her
World at peace, no forced cuckolding gonna be, all vanilla boys shall be at ease
If baleflight too op first (and ofc he got more resource) and end up taking captive Melissa at least I put up a good fight
If comes decision between let my lover getting touch by some mad scientist vs fight, defend her but it means game over the vanilla side of me will pick game over any day
Either I die with Melissa or I die without knowing her shared
Again that's the vanilla side of me talking
And talk about the scene
Well I guess theres plenty of way how you can thread it but the core message is he's going to touch her (sexually) but then something halt him
And what halt him? I guess plenty
Example like mc manage to sneak out and kill his strongest minions or ruin his works so he need to do something about it and that halt him from getting sexual with her when he almost do
Scenario like Melissa try to fightback also possible but since baleflight seems to be stronger it's less logical but still possible
Then come some conversation between Melissa and baleflight to point out he did nothing sexually with her will be a better remedy rather having melissa the only one to tell mc post event
And it probably after or during the process of whatever experiment baleflight doing if having Melissa experimented is a must like if it's a future plot for her
Actually this game does the offensive vs chillax option before
I recalled in griselda castle mc got option to go offensive or wait for next morning
I went offensive since I like the battle
I hope I can go offensive with baleflight
The master indeed need help for rebuilding but if that means I let my closest maid who also like a lover go with him, even the setup was to checkout the castle, I personally would say f it, I would challenge him and if game over then so be it
Like the situation with me now who don't get the feel to continue the game
However you shape it, just enjoy it
Tis is all just my opinion
Gl