i would assume that doing it while making out would make the situation all that more erotic and comfortable for both you and her be careful though, she might not be comfortable just yet, just assuming that she wants you to finger her could cause trouble of you have assumed wrong i would talk to her about it to see how she feels about it before going in, if she is comfy and wants you to do it, im sure she will let you know herself
NDH, I would definitely talk to her first. I agree with thepsgamer, assuming can lead to bad things happening. Try this...next time you're making out casually slide your hands over her legs, and then slowly around her stomach area and then to her crotch. If she backs away, or pushes your hand away she isn't ready. The only way to know if she's really ready is to ask her when you feel like the time is right.
Please dont make assumptions. Assumptions be bad. I agree completely with the above, ease into it, hint that you want to finger her and see what she does.
Well how many bases have you gone around. If you're making out with her but you still haven't felt her boobs under the bra, then that step really needs to come 1st. I mean in doesn't have to, but when trying to ease into it and gauge the mutual reaction I'd say that should come 1st.
Take your time and ask her what she likes.... Keep those fingers pointed up tot he G-spot....make it count !!!!!