Doubting whether one had intercourse during haidh

Q: I'm really worried if I committed a sin. Yesterday when I was doing foreplay with my wife, I tried fingering and I saw a little pinkish color on my finger. My wife immediately went to the washroom and checked whether her periods started or not. She confirmed that her periods haven't started so I had sex with her the same night. But today her periods started. I'm worried whether that pinkish color was period blood. Had I committed a sin. Please tell me what I have to do.

Using one's husbands money to give sadaqah

Q: I am a woman with no income of my own. I do not receive a personal allowance from my husband for myself. He does give me a monthly allowance which is for household expenses. It really bothers me that he constantly sends money for building of wells and musjids for sadaqaa jaariyah for himself. Can I use a portion of this household money to send in my name for my own sadaqah?

Hurmat-e-musaaharah

Q: I touched a woman with lust sometime ago and I now wish to marry her daughter. Is it permissible for me to marry her daughter, or is hurmat-e-musaaharah established due to the touching? Can you explain to me, does hurmat-e-musaaharah become established by merely touching a woman with lust or is it necessary for one to have an erection? Further, what is the sign of lust in a male and female?