nobody says that she shouldn't also show love(simply throwing money, isn't love), but at the same time her actions are not one that befit a villain do they? an ass? sure, but not someone who tries to take advantage of you. She might be awkward around him as well, and don't know exactly how to show love. After all she is the one that fucked up, and not him and you tell me how many people you know that are upfront and readily says "I fucked up, sorry" and that shit gets worse as time goes by. She probably over corrects, and tried to do what she might have done with her daughter(just a guess). And of course it's very shallow, but at least she trying something but it's not sustainable and is not an alternative by any means.
If her and the mc find another moment to talk, maybe she'll try and get closer to him. I do want her to talk to him, and hopefully be more open about everything, and show actual signs of "taking care" of him(and not just in a pervy way).
Again, this is the beginning of the game. There needs to be some character development. She can't just jump him saying "I love you!!
I'm sorry!", as everyone than would've said she doesn't really mean it(much like how people read into her action now). She need to show us what she is willing to do and right now, she shows that she is willing to taking care of him financially.