Type some steps for with out taking pant
Take pictures of her while she works. At first, it will increase her desire, after a new option appears, this will no longer make her desire more but will make her move to another job.
The further you go, there will come a point where Jason's desire will also increase, this will make Jason want to take off his pants. (Recommended to make a save before the option appears)
Take it off: This will make Camila's desire increase a lot, increasing her lust at the end of the day.
Don't take it off: The day will end the same, only that Camila can trust you a little more. This decision contains a "secret route", if you grope Camila's ass while she is working standing still (upstairs at the right side of the bed), you will increase Jason's desire a lot, do it twice and when she is cleaning in the same way you will get the option to smell her ass in red or touching her in red, do it and you will activate the secret ending. (recommended to make another save before triggering the secret ending).
(In case you don't find her cleaning standing still, just take a picture of her so change her job until she is as you wish).