I don't know what you mean by "in the common day of our world", tbh. In most western, developed countries, forced marriage is not a big issue, yes. But it still happens, and it usually involves a very young girl and an older man for reasons other than love (obviously) or personal affinity.
In the books, neither Tyrion nor Sansa have a whole lot of choice in the matter, but of the two, Tyrion has more power. The way he saw it, they were stuck but they could maybe make the best of a really bad situation so he tries to be as kind to Sansa as possible under the circumstances. Sansa, on the other hand, rightfully has a huge distrust of ALL Lannisters by this point, Tyrion included since I think he's still suspected of trying to kill Bran. She also has a certain physical disgust of his deformities, and she isn't particularly diplomatic about it, either. Some Tyrion stans go on about how she should've been grateful, but I don't think that's really taking all the factors into consideration, including her age and experience.
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In the books, neither Tyrion nor Sansa have a whole lot of choice in the matter, but of the two, Tyrion has more power. The way he saw it, they were stuck but they could maybe make the best of a really bad situation so he tries to be as kind to Sansa as possible under the circumstances. Sansa, on the other hand, rightfully has a huge distrust of ALL Lannisters by this point, Tyrion included since I think he's still suspected of trying to kill Bran. She also has a certain physical disgust of his deformities, and she isn't particularly diplomatic about it, either. Some Tyrion stans go on about how she should've been grateful, but I don't think that's really taking all the factors into consideration, including her age and experience.