Am i spoiling her or just being nice?

im on my girl friends account. so im buying her these cute corsets,skirts,pants,and dress. i bought her a new cell phone, because hers broke. i love her so much and people say im spoiling her, i thought i was just being nice, doing what a boyfriend is suppost to do. i have bought her alot of stuff maybe all of it came up to 13,000$ but most of it was for the babies. i bought her this pillow and i guess it makes her more comfortable and it was acouple 100$. but thats because i dont want her to be uncomfortable in anyway. i bought her alot of 1zies for the babies, a crib ,breast pump,toys and much more. my friends say im spoiling her because she doesnt deserve. they say shes a slut because the babies shes pregnant with arent mine. i stand up for her because she had no control of what happened to her. so am i spoiling her or doing the right thing and being a good boyfriend. and so help me god i will **** you up if you say anything bad about my baby.