So you fall in love, you marry, and become a slave to support her family.

What's your is yours, what's hers is hers.

If you give her money for her to spend on herself then if she wants to give it to them that's up to her, otherwise if she feels oblidged to support her family then she should get a job.

Your family is you, your wife and kids (when and if you have them). That is who you are responsible for, no one else.