Books where FMC discovers her sexual limit/boundaries and MMC stops when he notices FMC is uncomfortable/hurt

Just as the title says, I'm looking for books where the FMC discovers her sexual limit/boundaries and the MMC stops when he takes notice how uncomfortable/hurt (doesn't have to be phsycially hurt, can be emotionally hurt) she is. I haven't seen a lot of books that are like this and I'm craving for this trope. It can be that the FMC and MMC are trying something new in the bedroom, or the MMC has a kink and the FMC wants to try it for him, but soon discovers that his kink is not for her and the MMC abandons the kink for her. Also, lots of praise and reassurance is needed, along with aftercare. Added bonus if there's drama about it depending on how the situation happened and grovel. No HR or small town romance please. CR, monster/alien, dark/mafia romance (although I know that's rarely seen), RH is much appreciated!