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There are no laws restricting who may date who.
If she is an adult, and you are not related by blood, (assuming she is the daughter of your sister-in-law from another man besides your brother) you would be permitted to marry or have sex with her. If you are related by blood or if she is a minor, you'd have to deal with possible rape and incest issues.
Before making this decision, you should give considerable thought to whether or not this is a good idea, especially if she is significantly younger than you are. It's likely that your family will not have a happy reaction to the union, and you should consider whether the two of you want to go through that. Additionally, you should consider what would happen if you dated and broke up. Your problems would be the fodder of family gossip, and you would still continue to see her at family events. It's quite possible that this could turn into a difficult situation for you both.
What else can I help you with?
Is it wrong to date your sister's boyfriend's cousin?
Absent any other twists... your sister's boyfriend is also your cousin, for example, so that your sister's boyfriend's cousin is your brother or something... it is completely fine to date your sister's boyfriend's cousin if you want to.
How do you arouse your cousin sister?
Court her on a gentleman's date.
Can I date my aunts cousin?
yes, you can. If your dad and your cousins mom are brother and sister then you can date your cousins cousin on your cousins dads side.
Can you date your cousin's girlfriends sister?
Only if she lets you, but you would have to ask her out first.
Can you go out with your third cousin?
There are no restrictions or laws that would make it a problem to date, or even marry, a third cousin.
How do you marry cousin sister?
Your cousin's sister is also your cousin. In some places it is legal to marry your cousin.
Are you related to you sisters cousin?
Your sister's cousin is your cousin, too, unless you and your sister are really step siblings with different parents. Then your sister's cousin is not related to you.
What relation am I to my husbands cousin's sister?
Your husband's cousin's sister is also your husband's cousin. You are not related to your husband's cousin.
Is it right to date your cousin by marriage?
A "cousin by marriage" is not your blood relative. That would be accepted in most jurisdictions but you need to check the laws in yours.
What do I call my half-sister's cousin... Half-sister... Step-sister... something else... why?
your half sisters cousin would be your cousin
If your sister has a godsister and your sister's godsister has a cousin and that's your sisters cousin will that be the little sisters cousin?
Ummm... I think so because the sister's cousin has to be related to you unless she is a stepsister.
What is the relationship of your mother's sister to you?
I know it's a cousin. The sister's daughter would be your first cousin, so her daughter would either be your second cousin OR first or second cousin once removed...one of those three haha but a cousin for sure.
