She is a girl who ultimately wants to get married.
By joking about it, she may be trying to see how you respond.
She may be curious to see whether you will freak out or whether you will just play along.
This is most likely the case if you notice that this girl that you met on an online dating service has joked about getting married a few times during your past conversations with her.
If it has happened a few times, she may be really trying to gauge whether you are open to the idea of getting married in the relatively foreseeable future.
On the flip side, if she only joked about getting married once during a conversation that you were having with her, she may have merely been joking and didn’t mean anything deeper by it.
Another way to figure out what her intentions may have been in joking about getting married is through how long she kept up with the joke.
If this girl that you met on an online dating service only joked about getting married for a brief moment and moved on to other topics soon after, she may have just been joking.
If you have already had previous conversations with her, you have had some time to get a good sense of what her character is like.
Does she come off as a really jokey kind of person?
If she does, then she may have merely been staying true to her character in joking about getting married.
This is especially true if during your conversations with her on the online dating service, you have noticed that she tends to make jokes about outlandish themes.
She may have joked in the past about something else that gave you pause or made you raise an eyebrow.
This may be the kind of joker that she is.
She may be the kind of person that goes for the most outlandish kind of jokes because she knows that these are the kind of jokes that garner the most shocked reactions.
Hence, she may like to go for the shock value in her jokes.
If you have noticed a pattern of her telling these kind of jokes, it may have been her intent to simply shock you by joking about getting married.
This girl that you met on an online dating service may have just wanted to joke about something like that so that she could get an authentic reaction out of you.
That may have been her only intent.
Hence, if you have noticed a pattern of jokes that tend to be outlandish in previous conversations that you have had with her, she may have merely joked about getting married for the shock value and nothing more.
Again, the length of time that she persisted with the joke is something that you can look into.
If she merely spent a few moments on it and moved on to other topics, there may have been nothing to it.
It may have just been a joke and nothing more.
However, if you noticed that she joked about getting married and persisted with the joke for a while, there is a chance that she may have really wanted to gauge your response to it.
This is especially true if you noticed that from time to time, she would reintroduce that joke even as the both of you had already moved on to talking about other topics.
In essence, the length of time in which she dwelt on that joke about getting married and the amount of instances in which she would reintroduce it throughout her conversation with you, may indicate that she is wondering just how agreeable you are to the concept of getting married in the foreseeable future.